Percentage Basics and Mental Math
What is 25% of 240?
Answer: 60
A jacket costs 80 dollars. Its price decreases by 25%. What is the new price?
60 dollars
After a 20% discount, a shirt costs 80 dollars. What was its original price?
100 dollars
A 100-dollar item receives a 20% discount followed by another 10% discount. What is the final price?
72 dollars
In a class of 40 students, 65% are girls. How many boys are in the class?
14
18 is what percentage of 72?
Answer: 25%
A population increases from 1200 to 1500. Find the percentage increase.
25%
30% of a number is 45. Find the number.
150
A number increases by 10% and then decreases by 10%. The original number is 200. What is the final number?
198
A student answers 80% of 50 questions correctly. How many questions does the student answer incorrectly?
10
Express 0.35 as a percentage.
35
The price of a phone is 500 dollars. Its price increases by 12%. What is the new price?
560 dollars
After a 10% salary increase, a worker earns 550 dollars. What was the original salary?
500 dollars
A price of 400 dollars increases by 25% and then decreases by 20%. What is the final price?
400 dollars
A shopkeeper buys an item for 400 dollars and sells it for 500 dollars. Find the profit percentage based on the cost price.
25%
72% of a number is 36. What is the number?
50
A number decreases by 15% and becomes 544. What was the original number?
640
A laptop is sold for 180 dollars after a 25% discount. What was its original price?
240 dollars
A population of 10,000 increases by 20% in one year and by 10% the next year. What is the population after two years?
13200
A number is 40% greater than 50. What is the number?
70
Find 15% of 80 plus 20% of 50.
22
A price increases from 200 to 230. Find the percentage increase.
15%
After increasing a number by 20%, the result is 360. Find the original number.
300
A product's price increases by 25%. By what percentage must the new price decrease to return to the original price?
20%
In an election, a candidate receives 60% of the votes and wins by 800 votes. There are only two candidates. How many votes were cast in total?
4000 votes