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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 903 · 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 3200 litres. 40% of the water is used. How many litres are left?
  2. 2.A price goes up by 20% and then comes down by 15%. By what percent has it gone up in all? =
  3. 3.A town has 4500 people. Its population grows by 20%. How many people live there now?
  4. 4.A water tank holds 4280 litres. 25% of the water is used. How many litres are left?
  5. 5.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  6. 6.The price of a bicycle is ₹100. It goes up by 5%. What is the new price (in ₹)?
  7. 7.The price of a school bag changes from ₹2360 to ₹2950. By what percent did it go up?
  8. 8.A shop sells 2040 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  9. 9.The price of a school bag changes from ₹900 to ₹855. By what percent did it come down?
  10. 10.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  11. 11.A shop sells 4780 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  12. 12.A shop sells 2000 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  13. 13.The price of a school bag changes from ₹1920 to ₹2112. By what percent did it go up?
  14. 14.A water tank holds 400 litres. 15% of the water is used. How many litres are left?
  15. 15.A water tank holds 1740 litres. 5% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹360 to ₹216. By what percent did it come down?
  17. 17.The price of a school bag changes from ₹4140 to ₹5175. By what percent did it go up?
  18. 18.A water tank holds 4780 litres. 20% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹460 to ₹483. By what percent did it go up?
  20. 20.A water tank holds 4080 litres. 30% of the water is used. How many litres are left?
  21. 21.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
  22. 22.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  23. 23.The price of a bicycle is ₹340. It goes up by 20%. What is the new price (in ₹)?
  24. 24.A water tank holds 4820 litres. 25% of the water is used. How many litres are left?
  25. 25.A water tank holds 2120 litres. 20% of the water is used. How many litres are left?
  26. 26.A water tank holds 3240 litres. 25% of the water is used. How many litres are left?
  27. 27.The price of a school bag changes from ₹1020 to ₹918. By what percent did it come down?
  28. 28.The price of a school bag changes from ₹2300 to ₹1150. By what percent did it come down?
  29. 29.A shop sells 2320 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  30. 30.A water tank holds 3600 litres. 20% of the water is used. How many litres are left?
  31. 31.A water tank holds 1980 litres. 30% of the water is used. How many litres are left?
  32. 32.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  33. 33.The price of a school bag changes from ₹960 to ₹1440. By what percent did it go up?
  34. 34.A water tank holds 60 litres. 20% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹1200 to ₹1320. By what percent did it go up?
  36. 36.A water tank holds 4520 litres. 50% of the water is used. How many litres are left?
  37. 37.A shop sells 760 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  38. 38.The price of a school bag changes from ₹1360 to ₹1632. By what percent did it go up?
  39. 39.A water tank holds 80 litres. 20% of the water is used. How many litres are left?
  40. 40.The price of a school bag changes from ₹3800 to ₹1900. By what percent did it come down?

Answer key

  1. 1920
  2. 2
  3. 5400
  4. 3210
  5. 72.5
  6. 105
  7. 25
  8. 2856
  9. 5
  10. 38
  11. 5975
  12. 3000
  13. 10
  14. 340
  15. 1653
  16. 40
  17. 25
  18. 3824
  19. 5
  20. 2856
  21. 28
  22. 4.5
  23. 408
  24. 3615
  25. 1696
  26. 2430
  27. 10
  28. 50
  29. 3248
  30. 2880
  31. 1386
  32. 19
  33. 50
  34. 48
  35. 10
  36. 2260
  37. 836
  38. 20
  39. 64
  40. 50

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