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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 706 · 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 1960 litres. 15% of the water is used. How many litres are left?
  2. 2.A water tank holds 1920 litres. 25% of the water is used. How many litres are left?
  3. 3.A shop sells 2680 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  4. 4.A water tank holds 1320 litres. 15% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹4360 to ₹3270. By what percent did it come down?
  6. 6.The price of a school bag changes from ₹1480 to ₹1184. By what percent did it come down?
  7. 7.A water tank holds 1160 litres. 15% of the water is used. How many litres are left?
  8. 8.A price goes up by 20% and then goes up by 50% more. By what percent has it gone up in all? =
  9. 9.The price of a school bag changes from ₹2640 to ₹3696. By what percent did it go up?
  10. 10.A water tank holds 4200 litres. 15% of the water is used. How many litres are left?
  11. 11.A town has 420 people. Its population grows by 20%. How many people live there now?
  12. 12.A water tank holds 300 litres. 30% of the water is used. How many litres are left?
  13. 13.A shop sells 1340 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  14. 14.The price of a bicycle is ₹3820. It goes up by 10%. What is the new price (in ₹)?
  15. 15.The price of a school bag changes from ₹3840 to ₹4992. By what percent did it go up?
  16. 16.A water tank holds 2740 litres. 5% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹1660 to ₹1992. By what percent did it go up?
  18. 18.A town has 100 people. Its population grows by 40%. How many people live there now?
  19. 19.A town has 900 people. Its population grows by 5%. How many people live there now?
  20. 20.A price comes down by 40% and then comes down by 10% more. By what percent has it come down in all? =
  21. 21.The price of a bicycle is ₹1120. It goes up by 15%. What is the new price (in ₹)?
  22. 22.A shop sells 3120 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  23. 23.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  24. 24.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  25. 25.The price of a school bag changes from ₹2480 to ₹2728. By what percent did it go up?
  26. 26.A shop sells 3540 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  27. 27.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  28. 28.The price of a school bag changes from ₹1100 to ₹825. By what percent did it come down?
  29. 29.A town has 3140 people. Its population grows by 20%. How many people live there now?
  30. 30.The price of a school bag changes from ₹1160 to ₹1392. By what percent did it go up?
  31. 31.The price of a school bag changes from ₹4680 to ₹3276. By what percent did it come down?
  32. 32.A shop sells 3240 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  33. 33.A price comes down by 40% and then comes down by 20% more. By what percent has it come down in all? =
  34. 34.The price of a bicycle is ₹1460. It goes up by 15%. What is the new price (in ₹)?
  35. 35.A water tank holds 1480 litres. 5% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹2400 to ₹2160. By what percent did it come down?
  37. 37.A town has 160 people. Its population grows by 20%. How many people live there now?
  38. 38.A water tank holds 2820 litres. 40% of the water is used. How many litres are left?
  39. 39.A water tank holds 3200 litres. 30% of the water is used. How many litres are left?
  40. 40.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =

Answer key

  1. 1666
  2. 1440
  3. 3082
  4. 1122
  5. 25
  6. 20
  7. 986
  8. 80
  9. 40
  10. 3570
  11. 504
  12. 210
  13. 1474
  14. 4202
  15. 30
  16. 2603
  17. 20
  18. 140
  19. 945
  20. 46
  21. 1288
  22. 3744
  23. 36.5
  24. 31.25
  25. 10
  26. 5310
  27. 38
  28. 25
  29. 3768
  30. 20
  31. 30
  32. 4536
  33. 52
  34. 1679
  35. 1406
  36. 10
  37. 192
  38. 1692
  39. 2240
  40. 43

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