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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 798 · 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 3340 litres. 5% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹1180 to ₹708. By what percent did it come down?
  3. 3.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  4. 4.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  5. 5.The price of a school bag changes from ₹2100 to ₹1050. By what percent did it come down?
  6. 6.A shop sells 3560 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  7. 7.The price of a bicycle is ₹3100. It goes up by 50%. What is the new price (in ₹)?
  8. 8.A shop sells 3260 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  9. 9.A water tank holds 2160 litres. 40% of the water is used. How many litres are left?
  10. 10.The price of a bicycle is ₹2000. It goes up by 50%. What is the new price (in ₹)?
  11. 11.A town has 1020 people. Its population grows by 30%. How many people live there now?
  12. 12.A town has 3540 people. Its population grows by 40%. How many people live there now?
  13. 13.A water tank holds 2840 litres. 10% of the water is used. How many litres are left?
  14. 14.A water tank holds 3380 litres. 5% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹920 to ₹1058. By what percent did it go up?
  16. 16.A town has 4560 people. Its population grows by 25%. How many people live there now?
  17. 17.A shop sells 4860 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  18. 18.The price of a bicycle is ₹3020. It goes up by 25%. What is the new price (in ₹)?
  19. 19.A water tank holds 4120 litres. 5% of the water is used. How many litres are left?
  20. 20.A water tank holds 1940 litres. 40% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹2100 to ₹1995. By what percent did it come down?
  22. 22.The price of a school bag changes from ₹2840 to ₹2698. By what percent did it come down?
  23. 23.A water tank holds 2500 litres. 25% of the water is used. How many litres are left?
  24. 24.A town has 2660 people. Its population grows by 30%. How many people live there now?
  25. 25.A water tank holds 1420 litres. 5% of the water is used. How many litres are left?
  26. 26.A town has 4220 people. Its population grows by 40%. How many people live there now?
  27. 27.A shop sells 480 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  28. 28.A water tank holds 600 litres. 20% of the water is used. How many litres are left?
  29. 29.A shop sells 1320 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  30. 30.The price of a bicycle is ₹440. It goes up by 30%. What is the new price (in ₹)?
  31. 31.The price of a school bag changes from ₹3340 to ₹2338. By what percent did it come down?
  32. 32.The price of a bicycle is ₹3780. It goes up by 15%. What is the new price (in ₹)?
  33. 33.The price of a school bag changes from ₹3220 to ₹4186. By what percent did it go up?
  34. 34.The price of a school bag changes from ₹4060 to ₹4263. By what percent did it go up?
  35. 35.The price of a bicycle is ₹840. It goes up by 20%. What is the new price (in ₹)?
  36. 36.The price of a bicycle is ₹3160. It goes up by 50%. What is the new price (in ₹)?
  37. 37.The price of a school bag changes from ₹460 to ₹230. By what percent did it come down?
  38. 38.The price of a bicycle is ₹740. It goes up by 15%. What is the new price (in ₹)?
  39. 39.The price of a school bag changes from ₹540 to ₹648. By what percent did it go up?
  40. 40.A water tank holds 1100 litres. 20% of the water is used. How many litres are left?

Answer key

  1. 3173
  2. 40
  3. 55
  4. 20
  5. 50
  6. 4272
  7. 4650
  8. 3586
  9. 1296
  10. 3000
  11. 1326
  12. 4956
  13. 2556
  14. 3211
  15. 15
  16. 5700
  17. 5589
  18. 3775
  19. 3914
  20. 1164
  21. 5
  22. 5
  23. 1875
  24. 3458
  25. 1349
  26. 5908
  27. 672
  28. 480
  29. 1716
  30. 572
  31. 30
  32. 4347
  33. 30
  34. 5
  35. 1008
  36. 4740
  37. 50
  38. 851
  39. 20
  40. 880

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