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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 956 · 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 bicycle is ₹320. It goes up by 50%. What is the new price (in ₹)?
  2. 2.The price of a school bag changes from ₹1120 to ₹1680. By what percent did it go up?
  3. 3.A town has 2100 people. Its population grows by 20%. How many people live there now?
  4. 4.The price of a bicycle is ₹3060. It goes up by 20%. What is the new price (in ₹)?
  5. 5.A water tank holds 3840 litres. 10% of the water is used. How many litres are left?
  6. 6.A water tank holds 3760 litres. 50% of the water is used. How many litres are left?
  7. 7.A shop sells 380 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  8. 8.A price comes down by 25% and then comes down by 20% more. By what percent has it come down in all? =
  9. 9.A water tank holds 260 litres. 15% of the water is used. How many litres are left?
  10. 10.A town has 860 people. Its population grows by 15%. How many people live there now?
  11. 11.A water tank holds 2860 litres. 40% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹1720 to ₹2236. By what percent did it go up?
  13. 13.A water tank holds 1440 litres. 10% of the water is used. How many litres are left?
  14. 14.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
  15. 15.A water tank holds 3560 litres. 40% of the water is used. How many litres are left?
  16. 16.A price goes up by 40% and then goes up by 50% more. By what percent has it gone up in all? =
  17. 17.The price of a school bag changes from ₹3520 to ₹4224. By what percent did it go up?
  18. 18.A price goes up by 25% and then goes up by 20% more. By what percent has it gone up in all? =
  19. 19.A price comes down by 15% and then comes down by 30% more. By what percent has it come down in all? =
  20. 20.The price of a bicycle is ₹4380. It goes up by 30%. What is the new price (in ₹)?
  21. 21.A water tank holds 2440 litres. 25% of the water is used. How many litres are left?
  22. 22.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  23. 23.A water tank holds 1260 litres. 25% of the water is used. How many litres are left?
  24. 24.A water tank holds 1120 litres. 25% of the water is used. How many litres are left?
  25. 25.A shop sells 3540 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  26. 26.The price of a school bag changes from ₹140 to ₹105. By what percent did it come down?
  27. 27.A water tank holds 3400 litres. 5% of the water is used. How many litres are left?
  28. 28.The price of a school bag changes from ₹4420 to ₹5746. By what percent did it go up?
  29. 29.A water tank holds 2640 litres. 15% of the water is used. How many litres are left?
  30. 30.A shop sells 4860 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  31. 31.A water tank holds 1440 litres. 20% of the water is used. How many litres are left?
  32. 32.A water tank holds 1420 litres. 40% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹460 to ₹414. By what percent did it come down?
  34. 34.A water tank holds 300 litres. 5% of the water is used. How many litres are left?
  35. 35.The price of a bicycle is ₹940. It goes up by 15%. What is the new price (in ₹)?
  36. 36.The price of a school bag changes from ₹2480 to ₹2728. By what percent did it go up?
  37. 37.The price of a school bag changes from ₹4560 to ₹5928. By what percent did it go up?
  38. 38.A town has 1340 people. Its population grows by 10%. How many people live there now?
  39. 39.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  40. 40.A town has 3280 people. Its population grows by 25%. How many people live there now?

Answer key

  1. 480
  2. 50
  3. 2520
  4. 3672
  5. 3456
  6. 1880
  7. 399
  8. 40
  9. 221
  10. 989
  11. 1716
  12. 30
  13. 1296
  14. 32.5
  15. 2136
  16. 110
  17. 20
  18. 50
  19. 40.5
  20. 5694
  21. 1830
  22. 28.75
  23. 945
  24. 840
  25. 5310
  26. 25
  27. 3230
  28. 30
  29. 2244
  30. 6075
  31. 1152
  32. 852
  33. 10
  34. 285
  35. 1081
  36. 10
  37. 30
  38. 1474
  39. 43
  40. 4100

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