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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 948 · 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 4300 litres. 25% of the water is used. How many litres are left?
  2. 2.A water tank holds 2620 litres. 50% of the water is used. How many litres are left?
  3. 3.A water tank holds 980 litres. 40% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹4080 to ₹5712. By what percent did it go up?
  5. 5.A water tank holds 1140 litres. 15% of the water is used. How many litres are left?
  6. 6.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  7. 7.The price of a school bag changes from ₹2040 to ₹2244. By what percent did it go up?
  8. 8.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
  9. 9.The price of a school bag changes from ₹2700 to ₹4050. By what percent did it go up?
  10. 10.A shop sells 3120 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  11. 11.The price of a school bag changes from ₹520 to ₹468. By what percent did it come down?
  12. 12.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹4600 to ₹4830. By what percent did it go up?
  14. 14.The price of a school bag changes from ₹2360 to ₹1888. By what percent did it come down?
  15. 15.A town has 1160 people. Its population grows by 25%. How many people live there now?
  16. 16.A water tank holds 760 litres. 10% of the water is used. How many litres are left?
  17. 17.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  18. 18.A water tank holds 920 litres. 20% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹4840 to ₹5082. By what percent did it go up?
  20. 20.A water tank holds 3180 litres. 10% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹4080 to ₹2040. By what percent did it come down?
  22. 22.A water tank holds 3260 litres. 30% of the water is used. How many litres are left?
  23. 23.The price of a school bag changes from ₹300 to ₹390. By what percent did it go up?
  24. 24.A shop sells 2800 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  25. 25.A water tank holds 660 litres. 50% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹4420 to ₹3978. By what percent did it come down?
  27. 27.The price of a bicycle is ₹3140. It goes up by 30%. What is the new price (in ₹)?
  28. 28.The price of a school bag changes from ₹1340 to ₹1608. By what percent did it go up?
  29. 29.A shop sells 3740 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  30. 30.The price of a school bag changes from ₹1680 to ₹2184. By what percent did it go up?
  31. 31.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  32. 32.A water tank holds 4540 litres. 50% of the water is used. How many litres are left?
  33. 33.The price of a bicycle is ₹380. It goes up by 25%. What is the new price (in ₹)?
  34. 34.A water tank holds 1640 litres. 20% of the water is used. How many litres are left?
  35. 35.A water tank holds 1980 litres. 50% of the water is used. How many litres are left?
  36. 36.The price of a bicycle is ₹3980. It goes up by 40%. What is the new price (in ₹)?
  37. 37.The price of a school bag changes from ₹440 to ₹352. By what percent did it come down?
  38. 38.A town has 2860 people. Its population grows by 40%. How many people live there now?
  39. 39.A shop sells 3440 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  40. 40.A shop sells 880 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?

Answer key

  1. 3225
  2. 1310
  3. 588
  4. 40
  5. 969
  6. 95
  7. 10
  8. 14.5
  9. 50
  10. 3432
  11. 10
  12. 15.5
  13. 5
  14. 20
  15. 1450
  16. 684
  17. 3.5
  18. 736
  19. 5
  20. 2862
  21. 50
  22. 2282
  23. 30
  24. 3220
  25. 330
  26. 10
  27. 4082
  28. 20
  29. 5236
  30. 30
  31. 27.5
  32. 2270
  33. 475
  34. 1312
  35. 990
  36. 5572
  37. 20
  38. 4004
  39. 3612
  40. 1012

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