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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 742 · 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 4640 litres. 20% of the water is used. How many litres are left?
  2. 2.A water tank holds 1420 litres. 20% of the water is used. How many litres are left?
  3. 3.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  4. 4.A water tank holds 3700 litres. 10% of the water is used. How many litres are left?
  5. 5.A water tank holds 380 litres. 50% of the water is used. How many litres are left?
  6. 6.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  7. 7.The price of a school bag changes from ₹680 to ₹782. By what percent did it go up?
  8. 8.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  9. 9.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  10. 10.The price of a school bag changes from ₹1200 to ₹900. By what percent did it come down?
  11. 11.A water tank holds 3340 litres. 10% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹1860 to ₹1488. By what percent did it come down?
  13. 13.A shop sells 3180 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  14. 14.The price of a school bag changes from ₹3980 to ₹2985. By what percent did it come down?
  15. 15.The price of a school bag changes from ₹4760 to ₹5712. By what percent did it go up?
  16. 16.A water tank holds 4680 litres. 25% of the water is used. How many litres are left?
  17. 17.The price of a bicycle is ₹1800. It goes up by 10%. What is the new price (in ₹)?
  18. 18.The price of a school bag changes from ₹2860 to ₹2574. By what percent did it come down?
  19. 19.The price of a school bag changes from ₹1220 to ₹1403. By what percent did it go up?
  20. 20.The price of a school bag changes from ₹3380 to ₹4225. By what percent did it go up?
  21. 21.The price of a bicycle is ₹2580. It goes up by 20%. What is the new price (in ₹)?
  22. 22.The price of a bicycle is ₹3640. It goes up by 50%. What is the new price (in ₹)?
  23. 23.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
  24. 24.The price of a school bag changes from ₹800 to ₹840. By what percent did it go up?
  25. 25.A water tank holds 3460 litres. 30% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹3620 to ₹3258. By what percent did it come down?
  27. 27.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  28. 28.A shop sells 2380 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  29. 29.A water tank holds 4880 litres. 10% of the water is used. How many litres are left?
  30. 30.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  31. 31.A water tank holds 420 litres. 30% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹2000 to ₹3000. By what percent did it go up?
  33. 33.A water tank holds 280 litres. 30% of the water is used. How many litres are left?
  34. 34.A town has 2700 people. Its population grows by 10%. How many people live there now?
  35. 35.The price of a school bag changes from ₹1300 to ₹1625. By what percent did it go up?
  36. 36.The price of a school bag changes from ₹1300 to ₹1950. By what percent did it go up?
  37. 37.The price of a school bag changes from ₹2340 to ₹3042. By what percent did it go up?
  38. 38.A water tank holds 1400 litres. 25% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹620 to ₹465. By what percent did it come down?
  40. 40.The price of a school bag changes from ₹1720 to ₹1376. By what percent did it come down?

Answer key

  1. 3712
  2. 1136
  3. 26.5
  4. 3330
  5. 190
  6. 37.5
  7. 15
  8. 87.5
  9. 38
  10. 25
  11. 3006
  12. 20
  13. 4452
  14. 25
  15. 20
  16. 3510
  17. 1980
  18. 10
  19. 15
  20. 25
  21. 3096
  22. 5460
  23. 28
  24. 5
  25. 2422
  26. 10
  27. 95
  28. 2499
  29. 4392
  30. 18.75
  31. 294
  32. 50
  33. 196
  34. 2970
  35. 25
  36. 50
  37. 30
  38. 1050
  39. 25
  40. 20

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