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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 871 · 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 ₹2100 to ₹2940. By what percent did it go up?
  2. 2.A water tank holds 3280 litres. 15% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹1220 to ₹854. By what percent did it come down?
  4. 4.A town has 1440 people. Its population grows by 50%. How many people live there now?
  5. 5.A water tank holds 3440 litres. 25% of the water is used. How many litres are left?
  6. 6.The price of a school bag changes from ₹3020 to ₹2718. By what percent did it come down?
  7. 7.A shop sells 3180 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  8. 8.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  9. 9.The price of a school bag changes from ₹1080 to ₹972. By what percent did it come down?
  10. 10.A price comes down by 40% and then comes down by 15% more. By what percent has it come down in all? =
  11. 11.The price of a school bag changes from ₹3580 to ₹3222. By what percent did it come down?
  12. 12.A water tank holds 960 litres. 10% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹3300 to ₹2970. By what percent did it come down?
  14. 14.The price of a school bag changes from ₹2280 to ₹1140. By what percent did it come down?
  15. 15.The price of a bicycle is ₹940. It goes up by 40%. What is the new price (in ₹)?
  16. 16.The price of a school bag changes from ₹4940 to ₹3952. By what percent did it come down?
  17. 17.The price of a school bag changes from ₹3980 to ₹4179. By what percent did it go up?
  18. 18.A town has 4020 people. Its population grows by 15%. How many people live there now?
  19. 19.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  20. 20.A water tank holds 1540 litres. 50% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹600 to ₹630. By what percent did it go up?
  22. 22.A water tank holds 140 litres. 5% of the water is used. How many litres are left?
  23. 23.A water tank holds 4620 litres. 10% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹2240 to ₹2576. By what percent did it go up?
  25. 25.A water tank holds 4240 litres. 40% of the water is used. How many litres are left?
  26. 26.A town has 3160 people. Its population grows by 50%. How many people live there now?
  27. 27.A water tank holds 840 litres. 30% of the water is used. How many litres are left?
  28. 28.A water tank holds 1980 litres. 5% of the water is used. How many litres are left?
  29. 29.A water tank holds 1160 litres. 40% of the water is used. How many litres are left?
  30. 30.A town has 3700 people. Its population grows by 10%. How many people live there now?
  31. 31.A water tank holds 1900 litres. 30% of the water is used. How many litres are left?
  32. 32.The price of a bicycle is ₹4000. It goes up by 40%. What is the new price (in ₹)?
  33. 33.A water tank holds 4600 litres. 50% of the water is used. How many litres are left?
  34. 34.A water tank holds 4400 litres. 5% of the water is used. How many litres are left?
  35. 35.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  36. 36.The price of a school bag changes from ₹3940 to ₹3349. By what percent did it come down?
  37. 37.A water tank holds 2060 litres. 5% of the water is used. How many litres are left?
  38. 38.The price of a bicycle is ₹1460. It goes up by 50%. What is the new price (in ₹)?
  39. 39.A town has 920 people. Its population grows by 25%. How many people live there now?
  40. 40.A water tank holds 2480 litres. 25% of the water is used. How many litres are left?

Answer key

  1. 40
  2. 2788
  3. 30
  4. 2160
  5. 2580
  6. 10
  7. 3339
  8. 26.5
  9. 10
  10. 49
  11. 10
  12. 864
  13. 10
  14. 50
  15. 1316
  16. 20
  17. 5
  18. 4623
  19. 61
  20. 770
  21. 5
  22. 133
  23. 4158
  24. 15
  25. 2544
  26. 4740
  27. 588
  28. 1881
  29. 696
  30. 4070
  31. 1330
  32. 5600
  33. 2300
  34. 4180
  35. 47
  36. 15
  37. 1957
  38. 2190
  39. 1150
  40. 1860

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