Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 767 · 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 3340 litres. 20% of the water is used. How many litres are left?
2. 2.The price of a bicycle is ₹880. It goes up by 20%. What is the new price (in ₹)?
3. 3.A price goes up by 50% and then goes up by 40% more. By what percent has it gone up in all? =
4. 4.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
5. 5.The price of a school bag changes from ₹900 to ₹1170. By what percent did it go up?
6. 6.A water tank holds 3460 litres. 5% of the water is used. How many litres are left?
7. 7.A water tank holds 4460 litres. 50% of the water is used. How many litres are left?
8. 8.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
9. 9.A water tank holds 3800 litres. 15% of the water is used. How many litres are left?
10. 10.A water tank holds 200 litres. 30% of the water is used. How many litres are left?
11. 11.A water tank holds 2140 litres. 10% of the water is used. How many litres are left?
12. 12.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
13. 13.A water tank holds 3720 litres. 25% of the water is used. How many litres are left?
14. 14.A shop sells 160 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
15. 15.A shop sells 1360 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
16. 16.The price of a bicycle is ₹1260. It goes up by 15%. What is the new price (in ₹)?
17. 17.A water tank holds 2920 litres. 10% of the water is used. How many litres are left?
18. 18.The price of a school bag changes from ₹2260 to ₹3390. By what percent did it go up?
19. 19.A water tank holds 580 litres. 40% of the water is used. How many litres are left?
20. 20.A shop sells 2260 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
21. 21.The price of a school bag changes from ₹1880 to ₹1786. By what percent did it come down?
22. 22.The price of a bicycle is ₹2960. It goes up by 40%. What is the new price (in ₹)?
23. 23.A water tank holds 1760 litres. 25% of the water is used. How many litres are left?
24. 24.A price goes up by 20% and then goes up by 20% more. By what percent has it gone up in all? =
25. 25.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
26. 26.A shop sells 3320 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
27. 27.A town has 4280 people. Its population grows by 30%. How many people live there now?
28. 28.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
29. 29.The price of a school bag changes from ₹460 to ₹575. By what percent did it go up?
30. 30.A water tank holds 100 litres. 40% of the water is used. How many litres are left?
31. 31.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
32. 32.A town has 1600 people. Its population grows by 30%. How many people live there now?
33. 33.The price of a bicycle is ₹4300. It goes up by 40%. What is the new price (in ₹)?
34. 34.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
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 10% and then goes up by 25% more. By what percent has it gone up in all? =
37. 37.A water tank holds 2980 litres. 30% of the water is used. How many litres are left?
38. 38.The price of a school bag changes from ₹3920 to ₹2352. By what percent did it come down?
39. 39.A water tank holds 4420 litres. 15% of the water is used. How many litres are left?
40. 40.A town has 1400 people. Its population grows by 30%. How many people live there now?

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