Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 45 · 40 questions

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.

1. 1.A town has 400 people. Its population grows by 25%. How many people live there now?
2. 2.A water tank holds 3900 litres. 10% of the water is used. How many litres are left?
3. 3.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
4. 4.A shop sells 2480 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
5. 5.A water tank holds 1780 litres. 40% of the water is used. How many litres are left?
6. 6.A shop sells 560 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
7. 7.A water tank holds 4720 litres. 10% of the water is used. How many litres are left?
8. 8.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
9. 9.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
10. 10.The price of a bicycle is ₹740. It goes up by 40%. What is the new price (in ₹)?
11. 11.A water tank holds 3900 litres. 5% of the water is used. How many litres are left?
12. 12.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
13. 13.The price of a bicycle is ₹860. It goes up by 15%. What is the new price (in ₹)?
14. 14.A water tank holds 3700 litres. 10% of the water is used. How many litres are left?
15. 15.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
16. 16.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
17. 17.The price of a bicycle is ₹4500. It goes up by 40%. What is the new price (in ₹)?
18. 18.A water tank holds 60 litres. 5% of the water is used. How many litres are left?
19. 19.A shop sells 1440 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
20. 20.A shop sells 3380 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
21. 21.A town has 4500 people. Its population grows by 50%. How many people live there now?
22. 22.A water tank holds 2400 litres. 25% of the water is used. How many litres are left?
23. 23.A water tank holds 2620 litres. 5% of the water is used. How many litres are left?
24. 24.The price of a bicycle is ₹420. It goes up by 20%. What is the new price (in ₹)?
25. 25.The price of a bicycle is ₹240. It goes up by 40%. What is the new price (in ₹)?
26. 26.The price of a bicycle is ₹3860. It goes up by 50%. What is the new price (in ₹)?
27. 27.The price of a bicycle is ₹1120. It goes up by 50%. What is the new price (in ₹)?
28. 28.A water tank holds 1280 litres. 5% of the water is used. How many litres are left?
29. 29.The price of a school bag changes from ₹1380 to ₹1449. By what percent did it go up?
30. 30.A water tank holds 3780 litres. 30% of the water is used. How many litres are left?
31. 31.A water tank holds 3900 litres. 20% of the water is used. How many litres are left?
32. 32.A town has 2760 people. Its population grows by 50%. How many people live there now?
33. 33.A water tank holds 5000 litres. 30% of the water is used. How many litres are left?
34. 34.A water tank holds 4140 litres. 40% of the water is used. How many litres are left?
35. 35.The price of a school bag changes from ₹1720 to ₹1634. By what percent did it come down?
36. 36.A water tank holds 1160 litres. 15% of the water is used. How many litres are left?
37. 37.A shop sells 4000 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
38. 38.A water tank holds 2200 litres. 15% of the water is used. How many litres are left?
39. 39.The price of a school bag changes from ₹800 to ₹640. By what percent did it come down?
40. 40.The price of a school bag changes from ₹5000 to ₹6000. By what percent did it go up?

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