Math: Percent of a Number
Finding a part of a whole using percents
Math: Percent of a Number
Finding a part of a whole using percents
Math - Grade 6-8
- 1
Find 25% of 80.
Twenty-five percent is the same as one-fourth.
Twenty-five percent of 80 is 20 because 0.25 x 80 = 20. - 2
Find 10% of 450.
Ten percent of 450 is 45 because 0.10 x 450 = 45. - 3
Find 60% of 35.
Change the percent to a decimal before multiplying.
Sixty percent of 35 is 21 because 0.60 x 35 = 21. - 4
Find 15% of 200.
Fifteen percent of 200 is 30 because 0.15 x 200 = 30. - 5
Find 5% of 320.
You can find 10% first and then take half of that amount.
Five percent of 320 is 16 because 0.05 x 320 = 16. - 6
A shirt costs $40. What is 30% of the price?
Thirty percent of $40 is $12 because 0.30 x 40 = 12. - 7
A class of 24 students has 75% of the students present. How many students are present?
Seventy-five percent is the same as three-fourths.
Eighteen students are present because 0.75 x 24 = 18. - 8
Find 125% of 48.
One hundred twenty-five percent of 48 is 60 because 1.25 x 48 = 60. - 9
A restaurant bill is $60. You want to leave a 20% tip. How much is the tip?
Twenty percent means 20 out of 100, or 0.20.
The tip is $12 because 0.20 x 60 = 12. - 10
Find 35% of 90.
Thirty-five percent of 90 is 31.5 because 0.35 x 90 = 31.5. - 11
A video game costs $50. It is on sale for 40% off. How much is the discount?
This problem asks for the amount taken off, not the final sale price.
The discount is $20 because 0.40 x 50 = 20. - 12
Find 12% of 150.
Twelve percent of 150 is 18 because 0.12 x 150 = 18. - 13
A water bottle holds 64 ounces. You drink 50% of it. How many ounces do you drink?
Fifty percent means one-half.
You drink 32 ounces because 0.50 x 64 = 32. - 14
A store has 80 backpacks. If 15% are red, how many red backpacks are there?
There are 12 red backpacks because 0.15 x 80 = 12. - 15
Find 8% of 250.
You can find 10% of 250 and adjust from there, or multiply by 0.08.
Eight percent of 250 is 20 because 0.08 x 250 = 20.