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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 852 · 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 town has 2500 people. Its population grows by 50%. How many people live there now?
  2. 2.A water tank holds 5000 litres. 10% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹3940 to ₹4137. By what percent did it go up?
  4. 4.A water tank holds 1560 litres. 20% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹1740 to ₹1827. By what percent did it go up?
  6. 6.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  7. 7.A town has 2800 people. Its population grows by 50%. How many people live there now?
  8. 8.A water tank holds 4960 litres. 5% of the water is used. How many litres are left?
  9. 9.A water tank holds 2600 litres. 20% of the water is used. How many litres are left?
  10. 10.A town has 3000 people. Its population grows by 5%. How many people live there now?
  11. 11.A water tank holds 2180 litres. 25% of the water is used. How many litres are left?
  12. 12.A water tank holds 1620 litres. 20% of the water is used. How many litres are left?
  13. 13.The price of a bicycle is ₹1280. It goes up by 15%. What is the new price (in ₹)?
  14. 14.The price of a school bag changes from ₹1440 to ₹1800. By what percent did it go up?
  15. 15.A shop sells 1080 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  16. 16.A water tank holds 80 litres. 25% of the water is used. How many litres are left?
  17. 17.A price goes up by 30% and then goes up by 15% more. By what percent has it gone up in all? =
  18. 18.A water tank holds 920 litres. 10% of the water is used. How many litres are left?
  19. 19.A water tank holds 1860 litres. 15% of the water is used. How many litres are left?
  20. 20.A water tank holds 3820 litres. 50% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹1300 to ₹1170. By what percent did it come down?
  22. 22.The price of a school bag changes from ₹540 to ₹486. By what percent did it come down?
  23. 23.The price of a school bag changes from ₹3400 to ₹2720. By what percent did it come down?
  24. 24.The price of a school bag changes from ₹3120 to ₹4056. By what percent did it go up?
  25. 25.A water tank holds 360 litres. 25% of the water is used. How many litres are left?
  26. 26.The price of a bicycle is ₹2460. It goes up by 30%. What is the new price (in ₹)?
  27. 27.A shop sells 1180 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  28. 28.A water tank holds 1280 litres. 30% of the water is used. How many litres are left?
  29. 29.A shop sells 2560 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  30. 30.The price of a school bag changes from ₹3900 to ₹3705. By what percent did it come down?
  31. 31.The price of a school bag changes from ₹3740 to ₹3179. By what percent did it come down?
  32. 32.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =
  33. 33.The price of a school bag changes from ₹1200 to ₹1380. By what percent did it go up?
  34. 34.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  35. 35.A water tank holds 4060 litres. 25% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹1460 to ₹1679. By what percent did it go up?
  37. 37.The price of a bicycle is ₹4520. It goes up by 40%. What is the new price (in ₹)?
  38. 38.A water tank holds 4640 litres. 15% of the water is used. How many litres are left?
  39. 39.A price goes up by 50% and then comes down by 5%. By what percent has it gone up in all? =
  40. 40.A water tank holds 1060 litres. 30% of the water is used. How many litres are left?

Answer key

  1. 3750
  2. 4500
  3. 5
  4. 1248
  5. 5
  6. 23.5
  7. 4200
  8. 4712
  9. 2080
  10. 3150
  11. 1635
  12. 1296
  13. 1472
  14. 25
  15. 1350
  16. 60
  17. 49.5
  18. 828
  19. 1581
  20. 1910
  21. 10
  22. 10
  23. 20
  24. 30
  25. 270
  26. 3198
  27. 1239
  28. 896
  29. 3840
  30. 5
  31. 15
  32. 32
  33. 15
  34. 57.5
  35. 3045
  36. 15
  37. 6328
  38. 3944
  39. 42.5
  40. 742

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