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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 600 · 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.The price of a school bag changes from ₹120 to ₹72. By what percent did it come down?
  2. 2.The price of a bicycle is ₹1240. It goes up by 15%. What is the new price (in ₹)?
  3. 3.A town has 100 people. Its population grows by 50%. How many people live there now?
  4. 4.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  5. 5.A town has 3280 people. Its population grows by 20%. How many people live there now?
  6. 6.The price of a bicycle is ₹420. It goes up by 15%. What is the new price (in ₹)?
  7. 7.The price of a bicycle is ₹3420. It goes up by 30%. What is the new price (in ₹)?
  8. 8.The price of a school bag changes from ₹2100 to ₹3150. By what percent did it go up?
  9. 9.The price of a school bag changes from ₹760 to ₹684. By what percent did it come down?
  10. 10.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  11. 11.The price of a school bag changes from ₹4160 to ₹5408. By what percent did it go up?
  12. 12.A town has 4120 people. Its population grows by 50%. How many people live there now?
  13. 13.A town has 3440 people. Its population grows by 50%. How many people live there now?
  14. 14.The price of a school bag changes from ₹4180 to ₹3762. By what percent did it come down?
  15. 15.The price of a school bag changes from ₹1980 to ₹1188. By what percent did it come down?
  16. 16.A water tank holds 3160 litres. 30% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹2940 to ₹2646. By what percent did it come down?
  18. 18.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  19. 19.The price of a bicycle is ₹2280. It goes up by 30%. What is the new price (in ₹)?
  20. 20.A water tank holds 3040 litres. 40% of the water is used. How many litres are left?
  21. 21.A shop sells 620 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  22. 22.The price of a bicycle is ₹2860. It goes up by 25%. What is the new price (in ₹)?
  23. 23.The price of a school bag changes from ₹4280 to ₹5350. By what percent did it go up?
  24. 24.A water tank holds 980 litres. 10% of the water is used. How many litres are left?
  25. 25.A town has 2180 people. Its population grows by 50%. How many people live there now?
  26. 26.A shop sells 4680 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  27. 27.The price of a school bag changes from ₹4780 to ₹2868. By what percent did it come down?
  28. 28.The price of a school bag changes from ₹1280 to ₹1664. By what percent did it go up?
  29. 29.A shop sells 2300 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  30. 30.The price of a school bag changes from ₹460 to ₹575. By what percent did it go up?
  31. 31.The price of a bicycle is ₹4900. It goes up by 20%. What is the new price (in ₹)?
  32. 32.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  33. 33.A shop sells 560 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  34. 34.A town has 3060 people. Its population grows by 40%. How many people live there now?
  35. 35.A water tank holds 840 litres. 15% of the water is used. How many litres are left?
  36. 36.A shop sells 820 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  37. 37.A water tank holds 4080 litres. 15% of the water is used. How many litres are left?
  38. 38.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  39. 39.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  40. 40.A water tank holds 820 litres. 15% of the water is used. How many litres are left?

Answer key

  1. 40
  2. 1426
  3. 150
  4. 3.5
  5. 3936
  6. 483
  7. 4446
  8. 50
  9. 10
  10. 43.75
  11. 30
  12. 6180
  13. 5160
  14. 10
  15. 40
  16. 2212
  17. 10
  18. 43
  19. 2964
  20. 1824
  21. 775
  22. 3575
  23. 25
  24. 882
  25. 3270
  26. 5616
  27. 40
  28. 30
  29. 2645
  30. 25
  31. 5880
  32. 57.5
  33. 616
  34. 4284
  35. 714
  36. 943
  37. 3468
  38. 26.5
  39. 4.5
  40. 697

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