Problem 1: Percent increase
A school store raised the price of a notebook from $4.00 to $5.00. Find the percent increase.
Problem 2: Gas price drop
The price of gas at a station near the Little League field fell from $4.00 to $3.60 per gallon. Find the percent decrease.
Problem 3: Percent decrease
A water tank held 50 gallons on Monday and 40 gallons on Friday. Find the percent decrease.
Problem 4: Growth of a seedling
A tomato seedling at the school garden was 25 inches tall in May and 28 inches tall in June. Find the percent increase in its height.
Problem 5: Falling attendance
Last Saturday, 250 fans watched a Little League game. This Saturday, 215 fans came. Find the percent decrease in attendance.
Problem 6: Price after a raise
A farmers market stand sells a crate of peaches for $60. The price rises by \(15\%\). Find the new price.
Problem 7: New monthly fee
Jamal's music app costs $14.00 per month. The company raises the fee by \(25\%\). Find the new monthly fee.
Problem 8: Time after a decrease
Priya's bus ride takes 90 minutes. A new express route cuts the time by \(30\%\). Find the new ride time.
Problem 9: Sale price
A jacket regularly costs $85 and is on sale for \(20\%\) off. Find the sale price.
Problem 10: Estimate error
Before the fair opened, Diego estimated that 450 people would attend. The actual attendance was 500. Find the percent error of his estimate.
Problem 11: Percent error
Liam measured the length of a table as \(12.6\text{ ft}\). The actual length is \(12\text{ ft}\). Find the percent error.
Problem 12: Find the original
After a \(20\%\) increase, a gym membership costs $60 per month. Find the original monthly price.
Problem 13: Price before the sale
Sofia paid $68 for a pair of boots that were on sale for \(15\%\) off. Find the regular price of the boots.
Problem 14: Which rose more?
The price of a movie ticket at Theater A rose from $30 to $36. At Theater B, a similar ticket rose from $50 to $58. The table shows the prices.
- Find the percent increase at each theater.
- Decide which theater had the greater percent increase. Explain why it is not the one with the larger dollar increase.
Problem 15: Population change
Mei's town had 8,000 residents in 2020 and 9,200 residents in 2024.
- Find the percent increase from 2020 to 2024.
- The population then falls by \(10\%\) by 2028. Find the 2028 population.
Problem 16: Discount and tax
The sale price of a pair of sneakers is $45 after a \(25\%\) discount.
- Find the original price.
- Sales tax is \(8\%\) of the sale price. Find the total cost.
Problem 17: Up then down
A trading card is worth $40. Its value rises by \(50\%\), and later the new value falls by \(50\%\).
- Find the value after the rise.
- Find the value after the fall.
- Find the overall percent change from the original $40.
Problem 18: Markup and discount
A shop buys a skateboard for $24 and marks up the price by \(75\%\). During a sale the marked price is reduced by \(20\%\).
- Find the marked price.
- Find the sale price.
- The sale price is what percent greater than the $24 cost?
Problem 19: Two years of growth
A town has 5,000 residents. Its population grows by \(20\%\) in the first year and by \(10\%\) of the new population in the second year.
- Find the population after each year.
- Find the overall percent increase over the two years.
- Priya says the overall increase is \(30\%\). Explain her mistake.
Problem 20: Bookstore markup
A bookstore buys a novel for $8 and sells it for $14.
- Find the markup as a percent of the cost.
- Later the selling price is reduced by \(30\%\). Find the reduced price.
- The reduced price is what percent greater than the $8 cost?
See every chapter on the Grade 7 math page.