Math Worksheets Land
Find Percentages of Numbers - Step-by-Step Lesson
Finding a percentage of a number is a skill learners must know in order to be successful thinkers. The resource introduces this concept with a guided explanation and can be used with the additional materials as a complete instructional...
Math Worksheets Land
Numbers Based on Percentage
Percent proportion problems (say that three times fast!) can be a tricky thing for young mathematicians to ace. But practice makes perfect and this resource provides five different versions of the same topic as a worksheet. Although no...
Illustrative Mathematics
Comparing Years
Who knew that the Egyptian, Julian, and Gregorian year were different lengths? Your mathematicians will! They will have to calculate the difference between the years in seconds and find the percent change. Using dimensional analysis,...
EngageNY
Fluency with Percents
Pupils build confidence working with percents as they work several types of percent problems to increase their fluency. The resource contains two sets of problems specifically designed to build efficiency in finding solutions of basic...
EngageNY
Percent Error Problems
Individuals measure a computer monitor and determine how accurate their measures are. The eighth segment in a series of 20 introduces the concept of percent error. Pupils find the percent error of their measurements and discuss the...
Illustrative Mathematics
Overlapping Squares
The objective of this activity is to find the percent of the area of a two squares overlapping. Mathematicians find the ratio of area for the part that overlaps to the rectangle formed. The final answer is a percent as a rate per 100....
Illustrative Mathematics
Dana's House
Your class is to find the percent of the lot that is not covered by a house. Make sure your pupils understand the problems before they begin. The lot is the whole of the percent problem and the house is the part. The exercise is good...
Curated OER
Finding Percents of a Number (A)
In this percents worksheet, students solve 40 problems in which the percent of a number is calculated. (Example: 35% of 31). There is no instruction on the page.
Curated OER
Finding Percent of Change/ Increase or Decrease
Seventh graders explore the skill of finding the increase and decrease of a quantity. Calculating the increase and decrease is covered by a percent. The proporition for finding a percent is also part of the lesson.
Curated OER
Percent Word Problems
In this word problem worksheet, learners find the percent of a number. This two-page worksheet contains 18 problems. Answers are provided on the last page.
Curated OER
Stoichiometry
In this stoichiometry worksheet, high schoolers solve thirty problems using the process of stoichiometry to find moles, molecules, and masses of substances in chemical reactions. Students balance chemical equations, find limiting...
Curated OER
The Mathematics of Chemical Formulas
Wow! This is one of the most exhaustive presentations on finding chemical formulas that you will come across! Beginning with the basics, and leaving junior chemists with procedures and concrete examples, this PowerPoint certainly...
Curated OER
2000 U.S. National Chemistry Olympiad National Exam - Part I
The National Chemistry Olympiad exams are comprehensive tests covering an entire year of chemistry concepts. You can use them as practice for competing in the challenge, or simply as a review, or as an actual final exam for your general...
David Pleacher
Candy Math Fun
Few things can motivate children to learn like the promise of a sweet and tasty treat. Given a bag of M&M®s, Skittles®, or other colorful candy, learners first predict the contents of the bag before counting the pieces, creating a...
Curated OER
Percent of Change, Discounted Price, and Total Price
In this percent of change worksheet, learners find the percent of increase and the percent of decrease. They compute sales tax and determine the final price. Students also figure the discounted price of an item. This one-page...
Curated OER
Bits and Pieces - More About Percents - Online Manipulatives
In this online percentages learning exercise, students access the Library of Virtual Manipulatives web site and open the percentage tool. They use the online tool to complete 8 multi-step questions making graphical representations and...
Curated OER
Percents: (An Application to Real Life Problems)
Seventh graders explore the concept of calculating percents. In this calculating percents lesson, 7th graders simulate ordering food off of a menu. Students work in groups to calculate the bill, tax, and the tip for the...
Curated OER
Molecular Mass and Percent Composition Worksheet
In this molecular mass and percent composition activity, students find the molecular mass of 10 compounds to three decimal places. They also find the percent composition of 7 compounds and express their answers to two decimal places.
Curated OER
Finding the Percent of Something
This PowerPoint demonstrates the process of finding the percent of a given number. The slides contain various word problems and questions that viewers must find the answer to. This slide show is interactive and allows the middle...
Curated OER
Determining Percent Composition
In this percent composition worksheet, high schoolers calculate the percent composition of compounds using their formula masses and masses of individual elements. They solve nine problems including calculating percent composition,...
Curated OER
Percent Notation
For this algebra worksheet, students divide circles into equal portions as they explore percents and decimals. They convert between decimals and fractions using ratio and proportion. There are 8 questions.
Curated OER
Molecular Mass and Percent Composition
For this molecular mass and percent composition worksheet, students complete 5 sections where they determine atomic masses of given elements, they determine formula masses for given molecules, they find the molecular mass of 12 molecules...
Curated OER
Tax Problem: Percents
In this tax worksheet, students solve 1 problem about taxes. Students find the federal and state tax on a given amount of money.
Curated OER
Four Decimal, Fraction, and Percent Activities
In this fraction worksheet, students solve problems presented in four different activities. The activities cover percentages, fractions, decimals, currency exchange, and value added tax. A card "game" is one of the activities. Partial...