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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 98 · 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 school bag changes from ₹160 to ₹240. By what percent did it go up?
  2. 2.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  3. 3.The price of a bicycle is ₹4040. It goes up by 20%. What is the new price (in ₹)?
  4. 4.The price of a school bag changes from ₹4000 to ₹4400. By what percent did it go up?
  5. 5.The price of a school bag changes from ₹3080 to ₹3234. By what percent did it go up?
  6. 6.A shop sells 2000 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  7. 7.The price of a bicycle is ₹1860. It goes up by 15%. What is the new price (in ₹)?
  8. 8.A water tank holds 2700 litres. 20% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹800 to ₹480. By what percent did it come down?
  10. 10.The price of a school bag changes from ₹4620 to ₹3234. By what percent did it come down?
  11. 11.A shop sells 4700 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  12. 12.The price of a school bag changes from ₹260 to ₹338. By what percent did it go up?
  13. 13.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  14. 14.A town has 3740 people. Its population grows by 25%. How many people live there now?
  15. 15.A town has 1300 people. Its population grows by 10%. How many people live there now?
  16. 16.A town has 120 people. Its population grows by 50%. How many people live there now?
  17. 17.A town has 1620 people. Its population grows by 5%. How many people live there now?
  18. 18.A shop sells 4060 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  19. 19.A town has 3420 people. Its population grows by 10%. How many people live there now?
  20. 20.A shop sells 2340 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  21. 21.The price of a bicycle is ₹2660. It goes up by 50%. What is the new price (in ₹)?
  22. 22.A water tank holds 1440 litres. 10% of the water is used. How many litres are left?
  23. 23.A water tank holds 660 litres. 40% of the water is used. How many litres are left?
  24. 24.A water tank holds 1720 litres. 15% of the water is used. How many litres are left?
  25. 25.A price goes up by 50% and then comes down by 5%. By what percent has it gone up in all? =
  26. 26.The price of a school bag changes from ₹320 to ₹336. By what percent did it go up?
  27. 27.The price of a school bag changes from ₹2580 to ₹1806. By what percent did it come down?
  28. 28.The price of a school bag changes from ₹1380 to ₹1311. By what percent did it come down?
  29. 29.The price of a school bag changes from ₹1080 to ₹1350. By what percent did it go up?
  30. 30.A town has 1960 people. Its population grows by 20%. How many people live there now?
  31. 31.A water tank holds 1200 litres. 20% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹2760 to ₹2346. By what percent did it come down?
  33. 33.A water tank holds 1420 litres. 50% of the water is used. How many litres are left?
  34. 34.A price goes up by 30% and then goes up by 20% more. By what percent has it gone up in all? =
  35. 35.The price of a school bag changes from ₹2580 to ₹1548. By what percent did it come down?
  36. 36.The price of a bicycle is ₹4240. It goes up by 30%. What is the new price (in ₹)?
  37. 37.A water tank holds 1960 litres. 20% of the water is used. How many litres are left?
  38. 38.A water tank holds 2620 litres. 30% of the water is used. How many litres are left?
  39. 39.A shop sells 400 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  40. 40.A town has 4840 people. Its population grows by 5%. How many people live there now?

Answer key

  1. 50
  2. 27.5
  3. 4848
  4. 10
  5. 5
  6. 2200
  7. 2139
  8. 2160
  9. 40
  10. 30
  11. 6580
  12. 30
  13. 56
  14. 4675
  15. 1430
  16. 180
  17. 1701
  18. 6090
  19. 3762
  20. 3042
  21. 3990
  22. 1296
  23. 396
  24. 1462
  25. 42.5
  26. 5
  27. 30
  28. 5
  29. 25
  30. 2352
  31. 960
  32. 15
  33. 710
  34. 56
  35. 40
  36. 5512
  37. 1568
  38. 1834
  39. 600
  40. 5082

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