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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 526 · 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 price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  2. 2.A price comes down by 20% and then comes down by 15% more. By what percent has it come down in all? =
  3. 3.The price of a school bag changes from ₹100 to ₹70. By what percent did it come down?
  4. 4.A shop sells 3860 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  5. 5.A water tank holds 2860 litres. 20% of the water is used. How many litres are left?
  6. 6.A price comes down by 20% and then comes down by 50% more. By what percent has it come down in all? =
  7. 7.A water tank holds 680 litres. 5% of the water is used. How many litres are left?
  8. 8.A price goes up by 40% and then comes down by 25%. By what percent has it gone up in all? =
  9. 9.A town has 2680 people. Its population grows by 5%. How many people live there now?
  10. 10.The price of a school bag changes from ₹3640 to ₹3276. By what percent did it come down?
  11. 11.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  12. 12.A water tank holds 3560 litres. 40% of the water is used. How many litres are left?
  13. 13.A water tank holds 1640 litres. 10% of the water is used. How many litres are left?
  14. 14.A water tank holds 4100 litres. 40% of the water is used. How many litres are left?
  15. 15.A shop sells 3220 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  16. 16.A town has 520 people. Its population grows by 15%. How many people live there now?
  17. 17.A town has 3200 people. Its population grows by 15%. How many people live there now?
  18. 18.The price of a school bag changes from ₹640 to ₹576. By what percent did it come down?
  19. 19.A water tank holds 220 litres. 5% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹3880 to ₹2328. By what percent did it come down?
  21. 21.A water tank holds 2920 litres. 20% of the water is used. How many litres are left?
  22. 22.A town has 1520 people. Its population grows by 5%. How many people live there now?
  23. 23.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  24. 24.A water tank holds 3100 litres. 50% of the water is used. How many litres are left?
  25. 25.A water tank holds 4680 litres. 15% of the water is used. How many litres are left?
  26. 26.A shop sells 3740 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  27. 27.A town has 1340 people. Its population grows by 25%. How many people live there now?
  28. 28.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
  29. 29.The price of a school bag changes from ₹3140 to ₹2355. By what percent did it come down?
  30. 30.The price of a school bag changes from ₹160 to ₹136. By what percent did it come down?
  31. 31.The price of a school bag changes from ₹2900 to ₹2175. By what percent did it come down?
  32. 32.The price of a school bag changes from ₹4640 to ₹4176. By what percent did it come down?
  33. 33.The price of a bicycle is ₹1320. It goes up by 40%. What is the new price (in ₹)?
  34. 34.A water tank holds 1180 litres. 10% of the water is used. How many litres are left?
  35. 35.A water tank holds 4700 litres. 25% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹3300 to ₹2475. By what percent did it come down?
  37. 37.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  38. 38.A water tank holds 3760 litres. 30% of the water is used. How many litres are left?
  39. 39.A shop sells 4500 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  40. 40.The price of a school bag changes from ₹980 to ₹686. By what percent did it come down?

Answer key

  1. 37.5
  2. 32
  3. 30
  4. 4825
  5. 2288
  6. 60
  7. 646
  8. 5
  9. 2814
  10. 10
  11. 8
  12. 2136
  13. 1476
  14. 2460
  15. 4830
  16. 598
  17. 3680
  18. 10
  19. 209
  20. 40
  21. 2336
  22. 1596
  23. 31.25
  24. 1550
  25. 3978
  26. 3927
  27. 1675
  28. 43.75
  29. 25
  30. 15
  31. 25
  32. 10
  33. 1848
  34. 1062
  35. 3525
  36. 25
  37. 23.5
  38. 2632
  39. 5850
  40. 30

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