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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 618 · 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 280 people. Its population grows by 10%. How many people live there now?
  2. 2.A shop sells 220 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  3. 3.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  4. 4.A shop sells 4120 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  5. 5.A water tank holds 4860 litres. 50% of the water is used. How many litres are left?
  6. 6.The price of a school bag changes from ₹420 to ₹378. By what percent did it come down?
  7. 7.A town has 2480 people. Its population grows by 20%. How many people live there now?
  8. 8.A shop sells 1920 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  9. 9.A water tank holds 2640 litres. 20% of the water is used. How many litres are left?
  10. 10.A shop sells 1280 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  11. 11.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  12. 12.A town has 4440 people. Its population grows by 30%. How many people live there now?
  13. 13.The price of a school bag changes from ₹120 to ₹126. By what percent did it go up?
  14. 14.A water tank holds 620 litres. 40% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹2760 to ₹3312. By what percent did it go up?
  16. 16.The price of a school bag changes from ₹4260 to ₹2556. By what percent did it come down?
  17. 17.The price of a bicycle is ₹3520. It goes up by 30%. What is the new price (in ₹)?
  18. 18.A water tank holds 2660 litres. 50% of the water is used. How many litres are left?
  19. 19.A water tank holds 3800 litres. 10% of the water is used. How many litres are left?
  20. 20.A water tank holds 2100 litres. 40% of the water is used. How many litres are left?
  21. 21.The price of a bicycle is ₹4500. It goes up by 50%. What is the new price (in ₹)?
  22. 22.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  23. 23.The price of a bicycle is ₹2040. It goes up by 20%. What is the new price (in ₹)?
  24. 24.A town has 320 people. Its population grows by 25%. How many people live there now?
  25. 25.The price of a school bag changes from ₹1160 to ₹1392. By what percent did it go up?
  26. 26.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  27. 27.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  28. 28.A price goes up by 40% and then comes down by 25%. By what percent has it gone up in all? =
  29. 29.A town has 3160 people. Its population grows by 5%. How many people live there now?
  30. 30.A water tank holds 220 litres. 5% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹3960 to ₹3762. By what percent did it come down?
  32. 32.The price of a bicycle is ₹3940. It goes up by 25%. What is the new price (in ₹)?
  33. 33.A town has 3640 people. Its population grows by 30%. How many people live there now?
  34. 34.The price of a school bag changes from ₹260 to ₹299. By what percent did it go up?
  35. 35.A town has 3220 people. Its population grows by 30%. How many people live there now?
  36. 36.A town has 3380 people. Its population grows by 30%. How many people live there now?
  37. 37.A water tank holds 2440 litres. 5% of the water is used. How many litres are left?
  38. 38.A water tank holds 2900 litres. 30% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹1580 to ₹1738. By what percent did it go up?
  40. 40.The price of a bicycle is ₹2640. It goes up by 25%. What is the new price (in ₹)?

Answer key

  1. 308
  2. 253
  3. 96
  4. 4944
  5. 2430
  6. 10
  7. 2976
  8. 2304
  9. 2112
  10. 1536
  11. 72.5
  12. 5772
  13. 5
  14. 372
  15. 20
  16. 40
  17. 4576
  18. 1330
  19. 3420
  20. 1260
  21. 6750
  22. 9.75
  23. 2448
  24. 400
  25. 20
  26. 52.5
  27. 80
  28. 5
  29. 3318
  30. 209
  31. 5
  32. 4925
  33. 4732
  34. 15
  35. 4186
  36. 4394
  37. 2318
  38. 2030
  39. 10
  40. 3300

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