Percentages of an amount

Percent means "out of 100" — 25% is 25 out of 100, or the fraction 25/100, or the decimal 0.25. To find a percentage of an amount, convert the percentage to a decimal and multiply. Percentages show up constantly in real life: discounts, interest, test scores, and tips.

Key terms

Percent:

A way of expressing a number as "out of 100".

Discount:

An amount taken off the original price.

Questions

1. 1. What does 50% mean?

   • 50 out of 100
   • 5 out of 100
   • 500 out of 100
   • 50 out of 1

2. 2. What is 50% of $20?

   • $5
   • $10
   • $15
   • $20

3. 3. What is 10% of $50?

   • $5
   • $10
   • $15
   • $50

4. 4. 25% is the same as which fraction?

   • 1/2
   • 1/4
   • 1/5
   • 3/4

5. 5. What is 100% of $30?

   • $0
   • $3
   • $30
   • $300

6. 6. A shirt is 50% off its $40 price. How much is the discount?

   • $10
   • $20
   • $30
   • $40

7. 7. 10% is the same as which decimal?

   • 0.01
   • 0.1
   • 1.0
   • 10

8. 8. What is 20% of $60?

   • $6
   • $12
   • $20
   • $40

9. 9. A $60 jacket is 20% off. What is the new price?

   • $40
   • $48
   • $50
   • $54

10. 10. What is 15% of $80?

    • $8
    • $12
    • $15
    • $16

11. 11. A test score is 18 out of 20. What percentage is that?

    • 80%
    • 85%
    • 90%
    • 95%

12. 12. A $120 pair of shoes is discounted by 25%. How much do you save?

    • $25
    • $30
    • $35
    • $40

13. 13. What is 5% of $200?

    • $5
    • $10
    • $15
    • $20

14. 14. A restaurant bill is $50, and you leave a 10% tip. How much is the tip?

    • $2
    • $5
    • $10
    • $15

15. 15. A $150 item is on sale for 30% off. What is the sale price?

    • $45
    • $95
    • $105
    • $120

16. 16. A phone bill increases from $40 to $46. What percentage increase is that?

    • 6%
    • 10%
    • 15%
    • 46%

17. 17. You score 42 out of 50 on a test. What percentage is that?

    • 74%
    • 80%
    • 84%
    • 90%

18. 18. A $80 item has 15% GST added. What is the total price?

    • $88
    • $92
    • $95
    • $85

19. 19. A store discounts a $200 item by 15%, then takes a further 10% off the new price. What is the final price?

    • $150
    • $153
    • $160
    • $170

20. 20. Your savings grow from $500 to $540 in a year. What percentage growth is that?

    • 4%
    • 8%
    • 10%
    • 40%

21. 21. A $45 item is marked up by 20% for resale. What is the new price?

    • $50
    • $52
    • $54
    • $56