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,...

Analyze trends in the stock market using histograms. Future economists use data presented in a histogram to find periods of greatest increase and decrease. They also draw conclusions about days that would be best to invest.

What happens when you have a recipe and need to up the measurements? Here is a instructional activity that explains how to use ratios to convert measurements and percents with worked out problems. Also provided are additional...

Need practice with markups and markdowns? Use the resource along with its three counterparts to discover how the price of an item changes when given a percent increase or decrease. 

The 20th segment in a series of 25 has learners work with percentage problems to generate equivalent expressions. Pupils find discounted prices using numerical and algebraic expressions. The task then requires individuals to find the...

In this percent of change worksheet, students 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...

In this percent of change worksheet, students calculate the change in two whole numbers. They compute the percent of change and indicate if it is an increase or decrease.

In this ratio, proportion and percent worksheet, learners solve problems involving ratios and proportions. They identify the percent of increase and decrease, solve ratio problems with proportions, and find sale prices. This two-page...

In this percent of change worksheet, students determine the percent of increase and the percent of decrease.  This two-page worksheet contains 24 problems.  Answers are provided on the last page.

Pupils explore percent increases and decreases. They calculate the percent increase and decrease. Students use math to solve problems and communicate. They apply the given formula for percent increase/decrease.

Math in real life IS a thing and your learners can see how when they practice ratio word problems. Use the handy ratio to convert between measurements and figure out the answer when given a change of information. Resource also comes with...

Show learners how math is all around them with a learning exercise that practices with percentage change. Match the eight problems regarding markups and markdowns to the answer choices, and see if they are ready to start...

Helpful after a lesson on percentages, this worksheet can reinforce the steps and formulas necessary for finding percentages. Students calculate the percent one number is of another, and then the percent of change (increase or decrease)...

Statistically, waste may become a problem in the future if people do not take action. Using their knowledge of statistics and data representation, pupils take a look at the idea of waste generation. The four-part unit has class members...

In this math worksheet, students are given 9 percentage problems that involve conversion, variables, story problems and fractions.

Assemble a great lesson on assembly lines. In the first installment of a nine-part technology/engineering series, future entrepreneurs learn about the manufacturing process, specifically about the assembly line and cycle time. The lesson...

Find the percent of the population that meets the criteria. The 17th segment of a 20-part unit presents problems that involve percents of a population. Pupils use tape diagrams to create equations to find the percents of subgroups...

In this Algebra I learning exercise, 9th graders solve percent application problems, including percent of increase and decrease.  The one page interactive learning exercise contains seven problems.  Answers and a hint are...

This worksheet is meant to be used in laboratory experiments for which there is an accepted value that pupils are attempting to discover. It asks them to compare their results to commonly accepted values and then to calculate the percent...

The values keep getting smaller—quickly! Pupils watch a video that contrasts exponential decay with exponential growth from the first lesson in the unit. Learners identify exponential functions that are decaying and create graphs of...

In this percentages worksheet, students complete word problems dealing with percentage increases and decreases. Students complete 3 problems.

The greater the latitude, the less of the Earth is north. Scholars graph the relationship between the latitude and the percentage of the Earth that is north of the latitude. Using the graph and the table, class members interpret values...

Eighth graders investigate percents by comparing different discounts on the same sale item, practice graphing percents, and look at reasonable and unreasonable "percents off" a sale item.

High schoolers organize data from the USA TODAY Snapshot, "Is leisure time really shrinking?" into two scatter plots and determine the quadratic model for each scatter plot. They determine if these graphs intersect and learn the concept...