Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 59 · 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 water tank holds 160 litres. 15% of the water is used. How many litres are left?
2. 2.A shop sells 1120 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
3. 3.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
4. 4.A town has 2220 people. Its population grows by 30%. How many people live there now?
5. 5.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
6. 6.A water tank holds 2560 litres. 15% of the water is used. How many litres are left?
7. 7.A water tank holds 380 litres. 10% of the water is used. How many litres are left?
8. 8.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
9. 9.A water tank holds 4480 litres. 15% of the water is used. How many litres are left?
10. 10.The price of a bicycle is ₹3720. It goes up by 30%. What is the new price (in ₹)?
11. 11.A town has 3740 people. Its population grows by 20%. How many people live there now?
12. 12.The price of a school bag changes from ₹2060 to ₹2678. By what percent did it go up?
13. 13.A shop sells 1060 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
14. 14.A water tank holds 1660 litres. 5% of the water is used. How many litres are left?
15. 15.A water tank holds 4540 litres. 50% of the water is used. How many litres are left?
16. 16.The price of a bicycle is ₹1220. It goes up by 5%. What is the new price (in ₹)?
17. 17.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
18. 18.The price of a bicycle is ₹3940. It goes up by 5%. What is the new price (in ₹)?
19. 19.A price goes up by 40% and then comes down by 10%. By what percent has it gone up in all? =
20. 20.A water tank holds 480 litres. 5% of the water is used. How many litres are left?
21. 21.A water tank holds 4420 litres. 15% of the water is used. How many litres are left?
22. 22.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
23. 23.A shop sells 620 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
24. 24.A water tank holds 1660 litres. 15% of the water is used. How many litres are left?
25. 25.A water tank holds 3500 litres. 15% of the water is used. How many litres are left?
26. 26.The price of a bicycle is ₹1280. It goes up by 10%. What is the new price (in ₹)?
27. 27.A shop sells 4860 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
28. 28.A town has 440 people. Its population grows by 10%. How many people live there now?
29. 29.The price of a bicycle is ₹2520. It goes up by 10%. What is the new price (in ₹)?
30. 30.A shop sells 720 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
31. 31.A water tank holds 2180 litres. 50% of the water is used. How many litres are left?
32. 32.The price of a bicycle is ₹700. It goes up by 40%. What is the new price (in ₹)?
33. 33.The price of a school bag changes from ₹4160 to ₹4576. By what percent did it go up?
34. 34.A water tank holds 1220 litres. 20% of the water is used. How many litres are left?
35. 35.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
36. 36.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
37. 37.The price of a school bag changes from ₹4760 to ₹4998. By what percent did it go up?
38. 38.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
39. 39.A water tank holds 2400 litres. 15% of the water is used. How many litres are left?
40. 40.A water tank holds 2960 litres. 20% of the water is used. How many litres are left?

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