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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 481 · 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 price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  2. 2.A price goes up by 25% and then goes up by 25% more. By what percent has it gone up in all? =
  3. 3.A water tank holds 4180 litres. 30% of the water is used. How many litres are left?
  4. 4.A town has 300 people. Its population grows by 25%. How many people live there now?
  5. 5.A water tank holds 4280 litres. 10% of the water is used. How many litres are left?
  6. 6.A town has 2520 people. Its population grows by 50%. How many people live there now?
  7. 7.The price of a school bag changes from ₹700 to ₹735. By what percent did it go up?
  8. 8.The price of a school bag changes from ₹2820 to ₹2538. By what percent did it come down?
  9. 9.The price of a bicycle is ₹4280. It goes up by 5%. What is the new price (in ₹)?
  10. 10.A water tank holds 180 litres. 5% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹4380 to ₹6570. By what percent did it go up?
  12. 12.A water tank holds 4420 litres. 50% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹3300 to ₹3135. By what percent did it come down?
  14. 14.A shop sells 1200 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  15. 15.A shop sells 1160 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  16. 16.A town has 2520 people. Its population grows by 20%. How many people live there now?
  17. 17.A water tank holds 4380 litres. 5% of the water is used. How many litres are left?
  18. 18.A water tank holds 4920 litres. 40% of the water is used. How many litres are left?
  19. 19.A town has 3580 people. Its population grows by 25%. How many people live there now?
  20. 20.The price of a school bag changes from ₹3700 to ₹5180. By what percent did it go up?
  21. 21.A water tank holds 660 litres. 10% of the water is used. How many litres are left?
  22. 22.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
  23. 23.A town has 3140 people. Its population grows by 5%. How many people live there now?
  24. 24.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  25. 25.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  26. 26.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  27. 27.A shop sells 600 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  28. 28.A shop sells 660 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  29. 29.A town has 4240 people. Its population grows by 25%. How many people live there now?
  30. 30.The price of a school bag changes from ₹3480 to ₹4524. By what percent did it go up?
  31. 31.The price of a school bag changes from ₹540 to ₹810. By what percent did it go up?
  32. 32.A water tank holds 520 litres. 30% of the water is used. How many litres are left?
  33. 33.A shop sells 700 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  34. 34.The price of a bicycle is ₹3600. It goes up by 5%. What is the new price (in ₹)?
  35. 35.A price goes up by 50% and then comes down by 5%. By what percent has it gone up in all? =
  36. 36.The price of a bicycle is ₹160. It goes up by 15%. What is the new price (in ₹)?
  37. 37.A town has 1020 people. Its population grows by 20%. How many people live there now?
  38. 38.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =
  39. 39.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  40. 40.A water tank holds 140 litres. 40% of the water is used. How many litres are left?

Answer key

  1. 55
  2. 56.25
  3. 2926
  4. 375
  5. 3852
  6. 3780
  7. 5
  8. 10
  9. 4494
  10. 171
  11. 50
  12. 2210
  13. 5
  14. 1680
  15. 1624
  16. 3024
  17. 4161
  18. 2952
  19. 4475
  20. 40
  21. 594
  22. 32.5
  23. 3297
  24. 95
  25. 27.5
  26. 21
  27. 630
  28. 990
  29. 5300
  30. 30
  31. 50
  32. 364
  33. 875
  34. 3780
  35. 42.5
  36. 184
  37. 1224
  38. 32
  39. 47
  40. 84

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