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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 697 · 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 1200 people. Its population grows by 15%. How many people live there now?
  2. 2.The price of a bicycle is ₹2840. It goes up by 25%. What is the new price (in ₹)?
  3. 3.A price goes up by 25% and then comes down by 10%. By what percent has it gone up in all? =
  4. 4.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  5. 5.The price of a school bag changes from ₹1800 to ₹2340. By what percent did it go up?
  6. 6.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
  7. 7.A price comes down by 25% and then comes down by 40% more. By what percent has it come down in all? =
  8. 8.A water tank holds 1660 litres. 50% of the water is used. How many litres are left?
  9. 9.A water tank holds 4320 litres. 15% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹380 to ₹304. By what percent did it come down?
  11. 11.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
  12. 12.A shop sells 4300 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  13. 13.The price of a school bag changes from ₹360 to ₹396. By what percent did it go up?
  14. 14.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  15. 15.The price of a school bag changes from ₹2700 to ₹3105. By what percent did it go up?
  16. 16.A price comes down by 30% and then comes down by 20% more. By what percent has it come down in all? =
  17. 17.The price of a school bag changes from ₹4320 to ₹3240. By what percent did it come down?
  18. 18.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  19. 19.A water tank holds 500 litres. 5% of the water is used. How many litres are left?
  20. 20.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  21. 21.The price of a school bag changes from ₹2940 to ₹2499. By what percent did it come down?
  22. 22.A shop sells 2440 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  23. 23.The price of a bicycle is ₹340. It goes up by 25%. What is the new price (in ₹)?
  24. 24.The price of a school bag changes from ₹1140 to ₹1083. By what percent did it come down?
  25. 25.A town has 4980 people. Its population grows by 10%. How many people live there now?
  26. 26.The price of a school bag changes from ₹820 to ₹861. By what percent did it go up?
  27. 27.The price of a bicycle is ₹4280. It goes up by 15%. What is the new price (in ₹)?
  28. 28.A water tank holds 4000 litres. 15% of the water is used. How many litres are left?
  29. 29.A water tank holds 1460 litres. 5% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹2220 to ₹2109. By what percent did it come down?
  31. 31.The price of a school bag changes from ₹1400 to ₹2100. By what percent did it go up?
  32. 32.A water tank holds 2380 litres. 10% of the water is used. How many litres are left?
  33. 33.The price of a bicycle is ₹1680. It goes up by 30%. What is the new price (in ₹)?
  34. 34.A shop sells 1840 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  35. 35.The price of a bicycle is ₹780. It goes up by 50%. What is the new price (in ₹)?
  36. 36.The price of a bicycle is ₹800. It goes up by 50%. What is the new price (in ₹)?
  37. 37.The price of a school bag changes from ₹3740 to ₹5236. By what percent did it go up?
  38. 38.A water tank holds 2460 litres. 50% of the water is used. How many litres are left?
  39. 39.A water tank holds 4900 litres. 30% of the water is used. How many litres are left?
  40. 40.A water tank holds 2140 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 1380
  2. 3550
  3. 12.5
  4. 37.5
  5. 30
  6. 28
  7. 55
  8. 830
  9. 3672
  10. 20
  11. 33
  12. 4515
  13. 10
  14. 38
  15. 15
  16. 44
  17. 25
  18. 38
  19. 475
  20. 36.5
  21. 15
  22. 3660
  23. 425
  24. 5
  25. 5478
  26. 5
  27. 4922
  28. 3400
  29. 1387
  30. 5
  31. 50
  32. 2142
  33. 2184
  34. 2760
  35. 1170
  36. 1200
  37. 40
  38. 1230
  39. 3430
  40. 2033

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