Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 830 · 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 4380 litres. 25% of the water is used. How many litres are left?
2. 2.A water tank holds 3840 litres. 20% of the water is used. How many litres are left?
3. 3.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =
4. 4.A shop sells 280 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
5. 5.The price of a bicycle is ₹900. It goes up by 10%. What is the new price (in ₹)?
6. 6.A water tank holds 800 litres. 10% of the water is used. How many litres are left?
7. 7.The price of a school bag changes from ₹1640 to ₹1230. By what percent did it come down?
8. 8.A water tank holds 260 litres. 10% of the water is used. How many litres are left?
9. 9.The price of a school bag changes from ₹4440 to ₹5328. By what percent did it go up?
10. 10.The price of a school bag changes from ₹3360 to ₹3024. By what percent did it come down?
11. 11.A water tank holds 1080 litres. 20% of the water is used. How many litres are left?
12. 12.A price comes down by 20% and then comes down by 50% more. By what percent has it come down in all? =
13. 13.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
14. 14.A town has 1040 people. Its population grows by 5%. How many people live there now?
15. 15.A water tank holds 3760 litres. 40% of the water is used. How many litres are left?
16. 16.A shop sells 2720 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
17. 17.The price of a school bag changes from ₹2640 to ₹2244. By what percent did it come down?
18. 18.The price of a bicycle is ₹2400. It goes up by 5%. What is the new price (in ₹)?
19. 19.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =
20. 20.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
21. 21.A water tank holds 1220 litres. 10% of the water is used. How many litres are left?
22. 22.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
23. 23.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
24. 24.A water tank holds 680 litres. 30% of the water is used. How many litres are left?
25. 25.The price of a school bag changes from ₹4200 to ₹4410. By what percent did it go up?
26. 26.The price of a school bag changes from ₹2940 to ₹2205. By what percent did it come down?
27. 27.A water tank holds 4920 litres. 5% of the water is used. How many litres are left?
28. 28.A price goes up by 40% and then goes up by 20% more. By what percent has it gone up in all? =
29. 29.The price of a school bag changes from ₹1360 to ₹1020. By what percent did it come down?
30. 30.The price of a bicycle is ₹360. It goes up by 5%. What is the new price (in ₹)?
31. 31.A water tank holds 3920 litres. 25% of the water is used. How many litres are left?
32. 32.The price of a bicycle is ₹2520. It goes up by 25%. What is the new price (in ₹)?
33. 33.A town has 3260 people. Its population grows by 30%. How many people live there now?
34. 34.A water tank holds 900 litres. 50% of the water is used. How many litres are left?
35. 35.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
36. 36.A town has 1740 people. Its population grows by 5%. How many people live there now?
37. 37.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =
38. 38.The price of a school bag changes from ₹980 to ₹1078. By what percent did it go up?
39. 39.A water tank holds 1320 litres. 5% of the water is used. How many litres are left?
40. 40.The price of a school bag changes from ₹1960 to ₹1176. By what percent did it come down?

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