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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 580 · 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.The price of a school bag changes from ₹3520 to ₹2992. By what percent did it come down?
  2. 2.The price of a bicycle is ₹2660. It goes up by 20%. What is the new price (in ₹)?
  3. 3.A water tank holds 940 litres. 20% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹2040 to ₹2856. By what percent did it go up?
  5. 5.The price of a school bag changes from ₹3260 to ₹2608. By what percent did it come down?
  6. 6.A town has 2680 people. Its population grows by 50%. How many people live there now?
  7. 7.The price of a school bag changes from ₹880 to ₹792. By what percent did it come down?
  8. 8.The price of a school bag changes from ₹300 to ₹210. By what percent did it come down?
  9. 9.A water tank holds 2880 litres. 20% of the water is used. How many litres are left?
  10. 10.The price of a bicycle is ₹4380. It goes up by 50%. What is the new price (in ₹)?
  11. 11.The price of a school bag changes from ₹4300 to ₹3010. By what percent did it come down?
  12. 12.A town has 4820 people. Its population grows by 15%. How many people live there now?
  13. 13.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  14. 14.A water tank holds 4900 litres. 50% of the water is used. How many litres are left?
  15. 15.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  16. 16.The price of a bicycle is ₹4660. It goes up by 50%. What is the new price (in ₹)?
  17. 17.A price comes down by 30% and then comes down by 15% more. By what percent has it come down in all? =
  18. 18.A water tank holds 1680 litres. 5% of the water is used. How many litres are left?
  19. 19.The price of a bicycle is ₹1080. It goes up by 40%. What is the new price (in ₹)?
  20. 20.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  21. 21.The price of a school bag changes from ₹640 to ₹544. By what percent did it come down?
  22. 22.A water tank holds 3420 litres. 15% of the water is used. How many litres are left?
  23. 23.The price of a school bag changes from ₹3300 to ₹3465. By what percent did it go up?
  24. 24.A town has 2200 people. Its population grows by 30%. How many people live there now?
  25. 25.A town has 3600 people. Its population grows by 10%. How many people live there now?
  26. 26.A water tank holds 2580 litres. 40% of the water is used. How many litres are left?
  27. 27.A water tank holds 1480 litres. 20% of the water is used. How many litres are left?
  28. 28.The price of a school bag changes from ₹1920 to ₹960. By what percent did it come down?
  29. 29.The price of a school bag changes from ₹2660 to ₹3724. By what percent did it go up?
  30. 30.The price of a school bag changes from ₹4620 to ₹2310. By what percent did it come down?
  31. 31.The price of a school bag changes from ₹1280 to ₹1472. By what percent did it go up?
  32. 32.A water tank holds 3400 litres. 15% of the water is used. How many litres are left?
  33. 33.A town has 1940 people. Its population grows by 40%. How many people live there now?
  34. 34.A water tank holds 3260 litres. 30% of the water is used. How many litres are left?
  35. 35.A water tank holds 1100 litres. 50% of the water is used. How many litres are left?
  36. 36.A water tank holds 1860 litres. 25% of the water is used. How many litres are left?
  37. 37.A price comes down by 40% and then comes down by 10% more. By what percent has it come down in all? =
  38. 38.A town has 1000 people. Its population grows by 5%. How many people live there now?
  39. 39.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
  40. 40.A shop sells 3440 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?

Answer key

  1. 15
  2. 3192
  3. 752
  4. 40
  5. 20
  6. 4020
  7. 10
  8. 30
  9. 2304
  10. 6570
  11. 30
  12. 5543
  13. 87.5
  14. 2450
  15. 37.5
  16. 6990
  17. 40.5
  18. 1596
  19. 1512
  20. 26
  21. 15
  22. 2907
  23. 5
  24. 2860
  25. 3960
  26. 1548
  27. 1184
  28. 50
  29. 40
  30. 50
  31. 15
  32. 2890
  33. 2716
  34. 2282
  35. 550
  36. 1395
  37. 46
  38. 1050
  39. 28
  40. 5160

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