Lesson Worksheet: Percentage Change Mathematics • 7th Grade

At last year’s half marathon, Mason’s time was 2 hours and 6 minutes. This year, he ran the half marathon in 1 hour and 59 minutes. What percent of his previous time is this? Give your answer correct to one decimal place.

The table shows the number of hours Emma spent babysitting during the months of April and May. If she charges $6.50 per hour, determine the percent of change in the amount of money earned in that time period and whether it is an increase or a decrease.

Last year, Ethan could walk 4 miles in 100 minutes. Today, he can walk 4 miles in 80 minutes. Determine the percent of change and state whether it is an increase or a decrease.

At the start of a sale, Jennifer’s Shoes reduces prices by . After one week, the sale prices are reduced again by .

Olivia’s Footwear reduces its prices by at the start of the sale and then, after a week, reduces the sale prices by .

Compare the overall reduction in the two stores after week one of the sale.

Jacob invested $2,800 in a new business. Given that, after 27 months, he earned $630, determine the interest rate that was agreed upon.

Isabella wants to invest an amount of $1,400. Her bank offers two savings plans that use simple interest. Account A has an interest of over 24 months, and Account B has an interest of over 12 months. If she wants to have $1,600 by the end of the term, determine which account will help her achieve her goal.

Liam has $2,100 and he wants to save up to buy a car. Liam’s goal is to have $4,000 after 9 years. Is this possible if he invests with a simple rate of return of ?

A merchant purchased 25 meters of cloth at 50 LE a meter. He sold of the cloth at a profit, and the rest was sold for less than the merchant paid. Find the percentage profit or loss.

Find the percentage change from $835 to $690. Round to the nearest whole percent.

David used 75 g of a chocolate containing ‎ cocoa and 100 g of another type of chocolate containing ‎ cocoa. He mixed the chocolate with 150 g of butter, 250 g of flour, 150 g of sugar, and 2 eggs weighing 50 g each. What is the percent of cocoa in his chocolate cake before he bakes it? Give your answer correct to one decimal place if necessary.

A pair of headphones costs $100 at a store. Another store sells the same pair for $159. Determine the percentage increase in the price at the second store.

Victoria and Emma visited the bank on the same day. Victoria deposited $680 into her savings account, and Emma deposited $260 into his. Six months later, Victoria’s account balance increased to $748, whereas Emma’s account balance increased to $299. Determine the percentage of change for both accounts over that period, and find who had a greater percent of change.

Matthew and Hannah cleared their child’s wardrobe, removing the clothes that have become too small; the number of clothes decreased by . A few weeks later, after having bought some new clothes, they noticed that the number of clothes had increased by . Compared to the number of clothes before the clearance, is the new number of clothes bigger, smaller, or the same?

Charlotte sold her house at ‎ of the price she had bought it for six years before, which made her a profit of $39,000. How much had Charlotte bought her house for? Give your answer to the nearest thousand.

When Mason was 9 years old, he was 49 inches tall. He is now 12 years old and 56 inches tall. Determine, to the nearest tenth, the percentage increase in his height.

of the students in a school are boys. of those boys enjoy football. What percentage of the students at the school are boys who enjoy football?

A road has 7 lanes. Determine, to the nearest whole percent, the percentage change in the number of lanes if an extra lane is added in each direction.

In a country with a population of 270 million, about are vegan. By rounding the percentage to the nearest half, calculate an estimate for the number of citizens who are vegan.