← Percentage increase and decrease lesson New set →

Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 104 · 40 questions
TalentJR

The method (Start value is 100%): New value after a rise of p%: value + p% of value. After a fall: value − p% of value. Percent change = change ÷ starting value × 100. Two changes a% and b% one after the other: a + b + (a × b) ÷ 100, with a fall counted as minus.

NameDateTime takenScore ___ / 40
  1. 1.A water tank holds 4680 litres. 30% of the water is used. How many litres are left?
  2. 2.A town has 300 people. Its population grows by 10%. How many people live there now?
  3. 3.The price of a school bag changes from ₹2900 to ₹2610. By what percent did it come down?
  4. 4.A water tank holds 840 litres. 10% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹3480 to ₹5220. By what percent did it go up?
  6. 6.A water tank holds 2520 litres. 5% of the water is used. How many litres are left?
  7. 7.A water tank holds 80 litres. 40% of the water is used. How many litres are left?
  8. 8.A price comes down by 20% and then comes down by 20% more. By what percent has it come down in all? =
  9. 9.A shop sells 1880 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  10. 10.A shop sells 4240 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  11. 11.The price of a school bag changes from ₹380 to ₹570. By what percent did it go up?
  12. 12.The price of a school bag changes from ₹3000 to ₹3750. By what percent did it go up?
  13. 13.The price of a school bag changes from ₹4100 to ₹4510. By what percent did it go up?
  14. 14.The price of a bicycle is ₹160. It goes up by 20%. What is the new price (in ₹)?
  15. 15.A water tank holds 1860 litres. 15% of the water is used. How many litres are left?
  16. 16.A shop sells 1560 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  17. 17.The price of a school bag changes from ₹3480 to ₹1740. By what percent did it come down?
  18. 18.A water tank holds 260 litres. 25% of the water is used. How many litres are left?
  19. 19.A water tank holds 1580 litres. 30% of the water is used. How many litres are left?
  20. 20.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  21. 21.A water tank holds 2060 litres. 5% of the water is used. How many litres are left?
  22. 22.A water tank holds 3080 litres. 15% of the water is used. How many litres are left?
  23. 23.A water tank holds 3060 litres. 30% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹1220 to ₹732. By what percent did it come down?
  25. 25.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  26. 26.A shop sells 3900 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  27. 27.A price comes down by 25% and then comes down by 50% more. By what percent has it come down in all? =
  28. 28.The price of a bicycle is ₹760. It goes up by 30%. What is the new price (in ₹)?
  29. 29.A shop sells 2540 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  30. 30.A shop sells 120 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  31. 31.The price of a bicycle is ₹3400. It goes up by 10%. What is the new price (in ₹)?
  32. 32.A town has 3060 people. Its population grows by 5%. How many people live there now?
  33. 33.The price of a school bag changes from ₹680 to ₹952. By what percent did it go up?
  34. 34.A water tank holds 500 litres. 10% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹4520 to ₹5876. By what percent did it go up?
  36. 36.The price of a school bag changes from ₹1400 to ₹1190. By what percent did it come down?
  37. 37.A town has 4860 people. Its population grows by 50%. How many people live there now?
  38. 38.The price of a school bag changes from ₹4160 to ₹3120. By what percent did it come down?
  39. 39.A water tank holds 4760 litres. 50% of the water is used. How many litres are left?
  40. 40.The price of a school bag changes from ₹1260 to ₹1008. By what percent did it come down?

Answer key

  1. 3276
  2. 330
  3. 10
  4. 756
  5. 50
  6. 2394
  7. 48
  8. 36
  9. 2444
  10. 5300
  11. 50
  12. 25
  13. 10
  14. 192
  15. 1581
  16. 1872
  17. 50
  18. 195
  19. 1106
  20. 26.5
  21. 1957
  22. 2618
  23. 2142
  24. 40
  25. 17
  26. 5460
  27. 62.5
  28. 988
  29. 3810
  30. 138
  31. 3740
  32. 3213
  33. 40
  34. 450
  35. 30
  36. 15
  37. 7290
  38. 25
  39. 2380
  40. 20

Free quantitative aptitude lessons, practice and worksheets at talentjr.in/quantitative-aptitude