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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 453 · 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 2300 litres. 40% of the water is used. How many litres are left?
  2. 2.A water tank holds 820 litres. 40% of the water is used. How many litres are left?
  3. 3.A water tank holds 2700 litres. 40% of the water is used. How many litres are left?
  4. 4.A water tank holds 280 litres. 20% of the water is used. How many litres are left?
  5. 5.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  6. 6.The price of a school bag changes from ₹2280 to ₹1824. By what percent did it come down?
  7. 7.A water tank holds 3060 litres. 10% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹2540 to ₹1778. By what percent did it come down?
  9. 9.A water tank holds 1480 litres. 25% of the water is used. How many litres are left?
  10. 10.A town has 2560 people. Its population grows by 5%. How many people live there now?
  11. 11.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  12. 12.The price of a school bag changes from ₹960 to ₹912. By what percent did it come down?
  13. 13.A price goes up by 40% and then goes up by 50% more. By what percent has it gone up in all? =
  14. 14.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  15. 15.The price of a school bag changes from ₹2240 to ₹2576. By what percent did it go up?
  16. 16.A town has 3060 people. Its population grows by 30%. How many people live there now?
  17. 17.A town has 3560 people. Its population grows by 20%. How many people live there now?
  18. 18.The price of a school bag changes from ₹1720 to ₹2236. By what percent did it go up?
  19. 19.A shop sells 4240 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  20. 20.A shop sells 2720 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  21. 21.A water tank holds 3520 litres. 40% of the water is used. How many litres are left?
  22. 22.A water tank holds 740 litres. 15% of the water is used. How many litres are left?
  23. 23.The price of a school bag changes from ₹60 to ₹72. By what percent did it go up?
  24. 24.A water tank holds 1140 litres. 15% of the water is used. How many litres are left?
  25. 25.A water tank holds 500 litres. 50% of the water is used. How many litres are left?
  26. 26.A town has 640 people. Its population grows by 50%. How many people live there now?
  27. 27.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  28. 28.A water tank holds 720 litres. 40% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹700 to ₹1050. By what percent did it go up?
  30. 30.A water tank holds 3380 litres. 40% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹700 to ₹560. By what percent did it come down?
  32. 32.A shop sells 2460 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  33. 33.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  34. 34.The price of a bicycle is ₹3740. It goes up by 20%. What is the new price (in ₹)?
  35. 35.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
  36. 36.A town has 400 people. Its population grows by 20%. How many people live there now?
  37. 37.The price of a school bag changes from ₹840 to ₹966. By what percent did it go up?
  38. 38.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  39. 39.A price comes down by 30% and then comes down by 50% more. By what percent has it come down in all? =
  40. 40.A water tank holds 2720 litres. 10% of the water is used. How many litres are left?

Answer key

  1. 1380
  2. 492
  3. 1620
  4. 224
  5. 15.5
  6. 20
  7. 2754
  8. 30
  9. 1110
  10. 2688
  11. 37.5
  12. 5
  13. 110
  14. 28.75
  15. 15
  16. 3978
  17. 4272
  18. 30
  19. 5936
  20. 3808
  21. 2112
  22. 629
  23. 20
  24. 969
  25. 250
  26. 960
  27. 43.75
  28. 432
  29. 50
  30. 2028
  31. 20
  32. 3198
  33. 47
  34. 4488
  35. 6.25
  36. 480
  37. 15
  38. 36.5
  39. 65
  40. 2448

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