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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 234 · 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 water tank holds 820 litres. 30% of the water is used. How many litres are left?
  2. 2.A price comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =
  3. 3.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  4. 4.A water tank holds 4140 litres. 20% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹2320 to ₹1624. By what percent did it come down?
  6. 6.The price of a bicycle is ₹2580. It goes up by 5%. What is the new price (in ₹)?
  7. 7.A water tank holds 1780 litres. 5% of the water is used. How many litres are left?
  8. 8.A water tank holds 680 litres. 50% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹560 to ₹616. By what percent did it go up?
  10. 10.The price of a school bag changes from ₹240 to ₹216. By what percent did it come down?
  11. 11.A water tank holds 3840 litres. 5% of the water is used. How many litres are left?
  12. 12.A town has 1020 people. Its population grows by 5%. How many people live there now?
  13. 13.A water tank holds 4860 litres. 30% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹4320 to ₹5616. By what percent did it go up?
  15. 15.A water tank holds 4640 litres. 30% of the water is used. How many litres are left?
  16. 16.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  17. 17.A town has 500 people. Its population grows by 40%. How many people live there now?
  18. 18.A water tank holds 3760 litres. 10% of the water is used. How many litres are left?
  19. 19.A water tank holds 2320 litres. 25% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹820 to ₹1148. By what percent did it go up?
  21. 21.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  22. 22.A water tank holds 3460 litres. 5% of the water is used. How many litres are left?
  23. 23.A water tank holds 3520 litres. 30% of the water is used. How many litres are left?
  24. 24.A water tank holds 4200 litres. 30% of the water is used. How many litres are left?
  25. 25.A shop sells 4360 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  26. 26.A water tank holds 620 litres. 40% of the water is used. How many litres are left?
  27. 27.A water tank holds 1520 litres. 15% of the water is used. How many litres are left?
  28. 28.A water tank holds 780 litres. 30% of the water is used. How many litres are left?
  29. 29.A shop sells 4040 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  30. 30.A water tank holds 3220 litres. 10% of the water is used. How many litres are left?
  31. 31.A shop sells 2440 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  32. 32.A shop sells 3580 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  33. 33.The price of a bicycle is ₹1400. It goes up by 50%. What is the new price (in ₹)?
  34. 34.The price of a school bag changes from ₹1860 to ₹2604. By what percent did it go up?
  35. 35.A shop sells 3160 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  36. 36.A water tank holds 1520 litres. 30% of the water is used. How many litres are left?
  37. 37.A shop sells 1420 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  38. 38.A water tank holds 3940 litres. 5% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹3860 to ₹4053. By what percent did it go up?
  40. 40.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =

Answer key

  1. 574
  2. 75
  3. 9.75
  4. 3312
  5. 30
  6. 2709
  7. 1691
  8. 340
  9. 10
  10. 10
  11. 3648
  12. 1071
  13. 3402
  14. 30
  15. 3248
  16. 95
  17. 700
  18. 3384
  19. 1740
  20. 40
  21. 65
  22. 3287
  23. 2464
  24. 2940
  25. 4578
  26. 372
  27. 1292
  28. 546
  29. 4242
  30. 2898
  31. 3660
  32. 5012
  33. 2100
  34. 40
  35. 3318
  36. 1064
  37. 1562
  38. 3743
  39. 5
  40. 38

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