Math 8 · Unit 10: Percentages · Cambridge Lower Secondary Maths Stage 8

Questions

1. 1. Increase $80 by 15%.

   • $68
   • $92
   • $12
   • $95
   Check

2. 2. Decrease 200 by 30%.

   • 260
   • 140
   • 170
   • 60
   Check

3. 3. Price falls from $50 to $40. Percentage decrease?

   • 20%
   • 25%
   • 10%
   • 80%
   Check

4. 4. Population rises from 400 to 500. Percentage increase?

   • 25%
   • 20%
   • 100%
   • 125%
   Check

5. 5. A $60 jacket is reduced by 25%. Sale price?

   • $15
   • $45
   • $50
   • $35
   Check

6. 6. Wages of $300 rise by 4%. New wage?

   • $340
   • $12
   • $312
   • $304
   Check

7. 7. A 2 kg bag gets 10% extra free. New mass?

   • 2.2 kg
   • 12 kg
   • 2.1 kg
   • 2.02 kg
   Check

8. 8. Mass falls from 80 kg to 76 kg. Percentage decrease?

   • 4%
   • 0.05%
   • 95%
   • 5%
   Check

9. 9. Increase 50 by 100%.

   • 150
   • 50
   • 5000
   • 100
   Check

10. 10. A price goes up 10% and then down 10%. Is it back to the start?

    • Yes
    • No, it is lower
    • No, it is higher
    Check

11. 11. Decrease 75 by 20%.

    • 90
    • 55
    • 60
    • 15
    Check

12. 12. Increase 240 by 12.5%.

    • 270
    • 252
    • 264
    • 30
    Check

13. 13. Scores rise from 40 to 46. Percentage increase?

    • 13%
    • 46%
    • 15%
    • 6%
    Check

14. 14. A car worth $8000 loses 15% of its value. New value?

    • $6800
    • $9200
    • $1200
    • $7850
    Check

15. 15. Which is the original amount when finding percentage change?

    • 100
    • the new amount
    • the change
    • the starting amount
    Check