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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 996 · 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 40% and then comes down by 10%. By what percent has it gone up in all? =
  2. 2.The price of a school bag changes from ₹3840 to ₹3648. By what percent did it come down?
  3. 3.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  4. 4.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  5. 5.The price of a school bag changes from ₹2540 to ₹2032. By what percent did it come down?
  6. 6.A water tank holds 4080 litres. 5% of the water is used. How many litres are left?
  7. 7.A water tank holds 1460 litres. 40% of the water is used. How many litres are left?
  8. 8.A water tank holds 1340 litres. 10% of the water is used. How many litres are left?
  9. 9.A water tank holds 4980 litres. 25% of the water is used. How many litres are left?
  10. 10.The price of a bicycle is ₹2140. It goes up by 15%. What is the new price (in ₹)?
  11. 11.The price of a school bag changes from ₹2220 to ₹2664. By what percent did it go up?
  12. 12.The price of a school bag changes from ₹5000 to ₹2500. By what percent did it come down?
  13. 13.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  14. 14.A shop sells 400 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  15. 15.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  16. 16.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  17. 17.A shop sells 1240 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  18. 18.The price of a school bag changes from ₹900 to ₹1350. By what percent did it go up?
  19. 19.The price of a bicycle is ₹3620. It goes up by 10%. What is the new price (in ₹)?
  20. 20.The price of a school bag changes from ₹4940 to ₹6916. By what percent did it go up?
  21. 21.The price of a school bag changes from ₹160 to ₹80. By what percent did it come down?
  22. 22.A town has 4920 people. Its population grows by 30%. How many people live there now?
  23. 23.A water tank holds 4100 litres. 15% of the water is used. How many litres are left?
  24. 24.The price of a bicycle is ₹420. It goes up by 20%. What is the new price (in ₹)?
  25. 25.The price of a bicycle is ₹4020. It goes up by 25%. What is the new price (in ₹)?
  26. 26.A town has 1180 people. Its population grows by 50%. How many people live there now?
  27. 27.A water tank holds 1420 litres. 50% of the water is used. How many litres are left?
  28. 28.A town has 4200 people. Its population grows by 25%. How many people live there now?
  29. 29.The price of a bicycle is ₹1220. It goes up by 10%. What is the new price (in ₹)?
  30. 30.The price of a school bag changes from ₹3700 to ₹2775. By what percent did it come down?
  31. 31.The price of a school bag changes from ₹3580 to ₹3938. By what percent did it go up?
  32. 32.The price of a bicycle is ₹4680. It goes up by 20%. What is the new price (in ₹)?
  33. 33.A water tank holds 4860 litres. 40% of the water is used. How many litres are left?
  34. 34.The price of a bicycle is ₹780. It goes up by 5%. What is the new price (in ₹)?
  35. 35.A water tank holds 1360 litres. 5% of the water is used. How many litres are left?
  36. 36.A water tank holds 2700 litres. 5% of the water is used. How many litres are left?
  37. 37.A water tank holds 380 litres. 40% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹80 to ₹92. By what percent did it go up?
  39. 39.A shop sells 2360 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  40. 40.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =

Answer key

  1. 26
  2. 5
  3. 27.75
  4. 57.5
  5. 20
  6. 3876
  7. 876
  8. 1206
  9. 3735
  10. 2461
  11. 20
  12. 50
  13. 72.5
  14. 520
  15. 20.75
  16. 37.5
  17. 1488
  18. 50
  19. 3982
  20. 40
  21. 50
  22. 6396
  23. 3485
  24. 504
  25. 5025
  26. 1770
  27. 710
  28. 5250
  29. 1342
  30. 25
  31. 10
  32. 5616
  33. 2916
  34. 819
  35. 1292
  36. 2565
  37. 228
  38. 15
  39. 2714
  40. 55

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