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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 306 · 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 ₹3720 to ₹3534. By what percent did it come down?
  2. 2.A water tank holds 4680 litres. 25% of the water is used. How many litres are left?
  3. 3.A water tank holds 3800 litres. 40% of the water is used. How many litres are left?
  4. 4.A water tank holds 940 litres. 15% of the water is used. How many litres are left?
  5. 5.A water tank holds 3040 litres. 15% of the water is used. How many litres are left?
  6. 6.A water tank holds 1020 litres. 30% of the water is used. How many litres are left?
  7. 7.The price of a school bag changes from ₹1300 to ₹1430. By what percent did it go up?
  8. 8.A shop sells 1080 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  9. 9.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  10. 10.A water tank holds 2320 litres. 40% of the water is used. How many litres are left?
  11. 11.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  12. 12.A water tank holds 320 litres. 20% of the water is used. How many litres are left?
  13. 13.A water tank holds 2500 litres. 30% of the water is used. How many litres are left?
  14. 14.A water tank holds 360 litres. 10% of the water is used. How many litres are left?
  15. 15.A town has 2340 people. Its population grows by 25%. How many people live there now?
  16. 16.A water tank holds 1100 litres. 10% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹3600 to ₹5400. By what percent did it go up?
  18. 18.A water tank holds 2380 litres. 15% of the water is used. How many litres are left?
  19. 19.A price goes up by 15% and then goes up by 50% more. By what percent has it gone up in all? =
  20. 20.The price of a bicycle is ₹1480. It goes up by 50%. What is the new price (in ₹)?
  21. 21.A town has 3020 people. Its population grows by 40%. How many people live there now?
  22. 22.A price goes up by 20% and then comes down by 15%. By what percent has it gone up in all? =
  23. 23.A shop sells 2220 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  24. 24.A water tank holds 1160 litres. 40% of the water is used. How many litres are left?
  25. 25.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  26. 26.A price comes down by 50% and then comes down by 20% more. By what percent has it come down in all? =
  27. 27.The price of a bicycle is ₹1520. It goes up by 25%. What is the new price (in ₹)?
  28. 28.A water tank holds 2940 litres. 50% of the water is used. How many litres are left?
  29. 29.A price goes up by 20% and then goes up by 20% more. By what percent has it gone up in all? =
  30. 30.A water tank holds 3060 litres. 15% of the water is used. How many litres are left?
  31. 31.A water tank holds 960 litres. 10% of the water is used. How many litres are left?
  32. 32.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  33. 33.A water tank holds 1660 litres. 30% of the water is used. How many litres are left?
  34. 34.A price comes down by 10% and then comes down by 25% more. By what percent has it come down in all? =
  35. 35.A shop sells 2280 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  36. 36.A price goes up by 10% and then goes up by 40% more. By what percent has it gone up in all? =
  37. 37.The price of a school bag changes from ₹2420 to ₹2662. By what percent did it go up?
  38. 38.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  39. 39.The price of a school bag changes from ₹3420 to ₹2907. By what percent did it come down?
  40. 40.A water tank holds 2740 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 5
  2. 3510
  3. 2280
  4. 799
  5. 2584
  6. 714
  7. 10
  8. 1242
  9. 21
  10. 1392
  11. 31.25
  12. 256
  13. 1750
  14. 324
  15. 2925
  16. 990
  17. 50
  18. 2023
  19. 72.5
  20. 2220
  21. 4228
  22. 2
  23. 2442
  24. 696
  25. 43.75
  26. 60
  27. 1900
  28. 1470
  29. 44
  30. 2601
  31. 864
  32. 36.25
  33. 1162
  34. 32.5
  35. 2622
  36. 54
  37. 10
  38. 20.75
  39. 15
  40. 2603

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