Percent increase, percent decrease and percent error
Grade 7 Math Worksheet - Challenge Me
Circle the best answer, or write your answer on the line.
Kira's school library now has 220 books, after the number of books grew by 10%. How many books did it have before?
After 20% of its trees were cut down, Luz's park has 140 trees left. How many trees did the park have before?
Milo's bucket has 72 liters of water left after 25% leaked out. How many liters did the bucket hold before?
Pia's band had 200 fans. The crowd grew by 20%, then shrank by 10%. How many fans are there at the end?
Ren's young tree is 60 centimeters tall. It grows by 50%, then a storm trims it by 20%. How tall is the tree at the end?
Tala's class has 150 pizza slices. 20% get eaten, then a delivery adds 50% more than what is left. How many slices are there at the end?
Zee's orchard had 400 apples. Picking day brought 10% more apples, then wind took 10% of all of them. How many apples are there at the end?
Ari's kitchen scale reads within 2% of the true mass. A bag's true mass is 250 grams. What is the largest reading the scale could show?
Bo's measuring jug is within 4% of the true amount. The true amount is 500 milliliters. What is the smallest amount the jug could show?
x is the number of bikes at Luz's school on Monday. By Tuesday the number goes down by 10%, then up by 30%. Which expression gives the number on Wednesday?
- 1.2x
- 1.17x
- 1.3x
- 0.9x