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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 1 · 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 price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
  2. 2.A town has 1960 people. Its population grows by 50%. How many people live there now?
  3. 3.A water tank holds 1400 litres. 40% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹340 to ₹425. By what percent did it go up?
  5. 5.A price goes up by 25% and then comes down by 10%. By what percent has it gone up in all? =
  6. 6.A town has 2100 people. Its population grows by 20%. How many people live there now?
  7. 7.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  8. 8.The price of a bicycle is ₹4660. It goes up by 30%. What is the new price (in ₹)?
  9. 9.The price of a school bag changes from ₹1460 to ₹1533. By what percent did it go up?
  10. 10.A water tank holds 2680 litres. 5% of the water is used. How many litres are left?
  11. 11.A water tank holds 2340 litres. 20% of the water is used. How many litres are left?
  12. 12.A water tank holds 1560 litres. 30% of the water is used. How many litres are left?
  13. 13.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  14. 14.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  15. 15.The price of a bicycle is ₹4760. It goes up by 25%. What is the new price (in ₹)?
  16. 16.The price of a school bag changes from ₹3480 to ₹3828. By what percent did it go up?
  17. 17.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  18. 18.The price of a school bag changes from ₹3740 to ₹3366. By what percent did it come down?
  19. 19.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =
  20. 20.A town has 3420 people. Its population grows by 50%. How many people live there now?
  21. 21.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  22. 22.The price of a bicycle is ₹3880. It goes up by 25%. What is the new price (in ₹)?
  23. 23.A shop sells 1060 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  24. 24.A water tank holds 1920 litres. 30% of the water is used. How many litres are left?
  25. 25.A water tank holds 4380 litres. 40% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹3180 to ₹3657. By what percent did it go up?
  27. 27.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  28. 28.A shop sells 4180 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  29. 29.A water tank holds 3980 litres. 30% of the water is used. How many litres are left?
  30. 30.The price of a bicycle is ₹880. It goes up by 50%. What is the new price (in ₹)?
  31. 31.A water tank holds 4200 litres. 5% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹720 to ₹828. By what percent did it go up?
  33. 33.A water tank holds 3980 litres. 15% of the water is used. How many litres are left?
  34. 34.A water tank holds 1600 litres. 15% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹400 to ₹360. By what percent did it come down?
  36. 36.A shop sells 2460 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  37. 37.The price of a school bag changes from ₹2620 to ₹2227. By what percent did it come down?
  38. 38.A shop sells 200 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  39. 39.The price of a school bag changes from ₹1960 to ₹1176. By what percent did it come down?
  40. 40.A shop sells 3060 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?

Answer key

  1. 70
  2. 2940
  3. 840
  4. 25
  5. 12.5
  6. 2520
  7. 57.5
  8. 6058
  9. 5
  10. 2546
  11. 1872
  12. 1092
  13. 36.25
  14. 26
  15. 5950
  16. 10
  17. 37.5
  18. 10
  19. 32
  20. 5130
  21. 38
  22. 4850
  23. 1219
  24. 1344
  25. 2628
  26. 15
  27. 32.25
  28. 5852
  29. 2786
  30. 1320
  31. 3990
  32. 15
  33. 3383
  34. 1360
  35. 10
  36. 2583
  37. 15
  38. 260
  39. 40
  40. 4590

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