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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 834 · 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 comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  2. 2.A water tank holds 2100 litres. 20% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹2080 to ₹1872. By what percent did it come down?
  4. 4.A water tank holds 3520 litres. 10% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹2620 to ₹1310. By what percent did it come down?
  6. 6.A shop sells 2560 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  7. 7.A shop sells 1580 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  8. 8.A shop sells 240 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  9. 9.A water tank holds 2020 litres. 20% of the water is used. How many litres are left?
  10. 10.A water tank holds 2620 litres. 10% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹140 to ₹161. By what percent did it go up?
  12. 12.A water tank holds 740 litres. 5% of the water is used. How many litres are left?
  13. 13.A water tank holds 2340 litres. 15% of the water is used. How many litres are left?
  14. 14.A price comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =
  15. 15.The price of a school bag changes from ₹1100 to ₹825. By what percent did it come down?
  16. 16.A water tank holds 4180 litres. 5% of the water is used. How many litres are left?
  17. 17.The price of a bicycle is ₹2100. It goes up by 25%. What is the new price (in ₹)?
  18. 18.The price of a school bag changes from ₹4120 to ₹3502. By what percent did it come down?
  19. 19.The price of a school bag changes from ₹4740 to ₹6636. By what percent did it go up?
  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.A shop sells 940 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  22. 22.The price of a school bag changes from ₹460 to ₹230. By what percent did it come down?
  23. 23.The price of a school bag changes from ₹2820 to ₹2256. By what percent did it come down?
  24. 24.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  25. 25.A water tank holds 3360 litres. 10% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹3820 to ₹4011. By what percent did it go up?
  27. 27.The price of a bicycle is ₹1140. It goes up by 5%. What is the new price (in ₹)?
  28. 28.The price of a school bag changes from ₹3480 to ₹2958. By what percent did it come down?
  29. 29.The price of a bicycle is ₹900. It goes up by 40%. What is the new price (in ₹)?
  30. 30.A water tank holds 1220 litres. 15% of the water is used. How many litres are left?
  31. 31.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  32. 32.The price of a school bag changes from ₹4420 to ₹3978. By what percent did it come down?
  33. 33.A water tank holds 540 litres. 10% of the water is used. How many litres are left?
  34. 34.A water tank holds 1240 litres. 40% of the water is used. How many litres are left?
  35. 35.A town has 3200 people. Its population grows by 5%. How many people live there now?
  36. 36.The price of a school bag changes from ₹3660 to ₹4758. By what percent did it go up?
  37. 37.A water tank holds 120 litres. 50% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹720 to ₹648. By what percent did it come down?
  39. 39.A shop sells 380 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  40. 40.The price of a school bag changes from ₹3980 to ₹3582. By what percent did it come down?

Answer key

  1. 9.75
  2. 1680
  3. 10
  4. 3168
  5. 50
  6. 3840
  7. 1975
  8. 276
  9. 1616
  10. 2358
  11. 15
  12. 703
  13. 1989
  14. 75
  15. 25
  16. 3971
  17. 2625
  18. 15
  19. 40
  20. 46
  21. 1034
  22. 50
  23. 20
  24. 64
  25. 3024
  26. 5
  27. 1197
  28. 15
  29. 1260
  30. 1037
  31. 36.25
  32. 10
  33. 486
  34. 744
  35. 3360
  36. 30
  37. 60
  38. 10
  39. 418
  40. 10

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