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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 474 · 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 1020 people. Its population grows by 20%. How many people live there now?
  2. 2.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  3. 3.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  4. 4.The price of a bicycle is ₹3720. It goes up by 25%. What is the new price (in ₹)?
  5. 5.A water tank holds 1640 litres. 50% of the water is used. How many litres are left?
  6. 6.A town has 1820 people. Its population grows by 50%. How many people live there now?
  7. 7.A water tank holds 4380 litres. 20% of the water is used. How many litres are left?
  8. 8.A water tank holds 3440 litres. 5% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹4320 to ₹3888. By what percent did it come down?
  10. 10.A water tank holds 4480 litres. 5% of the water is used. How many litres are left?
  11. 11.A water tank holds 180 litres. 25% of the water is used. How many litres are left?
  12. 12.A shop sells 2960 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  13. 13.A water tank holds 240 litres. 10% of the water is used. How many litres are left?
  14. 14.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
  15. 15.A shop sells 460 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  16. 16.A shop sells 380 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  17. 17.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  18. 18.A water tank holds 760 litres. 30% of the water is used. How many litres are left?
  19. 19.A shop sells 3760 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  20. 20.A town has 4320 people. Its population grows by 20%. How many people live there now?
  21. 21.The price of a school bag changes from ₹940 to ₹1316. By what percent did it go up?
  22. 22.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  23. 23.The price of a school bag changes from ₹3480 to ₹5220. By what percent did it go up?
  24. 24.A shop sells 3420 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  25. 25.The price of a school bag changes from ₹3980 to ₹5174. By what percent did it go up?
  26. 26.A shop sells 4280 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  27. 27.A price goes up by 5% and then goes up by 50% more. By what percent has it gone up in all? =
  28. 28.A town has 2520 people. Its population grows by 30%. How many people live there now?
  29. 29.A town has 2580 people. Its population grows by 10%. How many people live there now?
  30. 30.The price of a bicycle is ₹380. It goes up by 15%. What is the new price (in ₹)?
  31. 31.A water tank holds 1500 litres. 5% of the water is used. How many litres are left?
  32. 32.A town has 2880 people. Its population grows by 25%. How many people live there now?
  33. 33.A water tank holds 420 litres. 25% of the water is used. How many litres are left?
  34. 34.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  35. 35.A water tank holds 3180 litres. 10% of the water is used. How many litres are left?
  36. 36.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  37. 37.A water tank holds 460 litres. 25% of the water is used. How many litres are left?
  38. 38.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  39. 39.A water tank holds 1160 litres. 40% of the water is used. How many litres are left?
  40. 40.The price of a school bag changes from ₹2840 to ₹3408. By what percent did it go up?

Answer key

  1. 1224
  2. 23.5
  3. 95
  4. 4650
  5. 820
  6. 2730
  7. 3504
  8. 3268
  9. 10
  10. 4256
  11. 135
  12. 4440
  13. 216
  14. 14
  15. 506
  16. 418
  17. 46
  18. 532
  19. 4888
  20. 5184
  21. 40
  22. 3.5
  23. 50
  24. 3933
  25. 30
  26. 5992
  27. 57.5
  28. 3276
  29. 2838
  30. 437
  31. 1425
  32. 3600
  33. 315
  34. 28.75
  35. 2862
  36. 72.5
  37. 345
  38. 47
  39. 696
  40. 20

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