Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 720 · 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 2140 litres. 5% of the water is used. How many litres are left?
2. 2.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
3. 3.A water tank holds 4620 litres. 30% of the water is used. How many litres are left?
4. 4.A water tank holds 340 litres. 10% of the water is used. How many litres are left?
5. 5.The price of a school bag changes from ₹2440 to ₹2318. By what percent did it come down?
6. 6.A town has 2360 people. Its population grows by 10%. How many people live there now?
7. 7.A water tank holds 700 litres. 50% of the water is used. How many litres are left?
8. 8.The price of a school bag changes from ₹260 to ₹221. By what percent did it come down?
9. 9.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
10. 10.The price of a bicycle is ₹3340. It goes up by 10%. What is the new price (in ₹)?
11. 11.A water tank holds 400 litres. 20% of the water is used. How many litres are left?
12. 12.A shop sells 2980 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
13. 13.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
14. 14.A town has 500 people. Its population grows by 10%. How many people live there now?
15. 15.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
16. 16.A town has 3900 people. Its population grows by 15%. How many people live there now?
17. 17.A shop sells 1280 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
18. 18.A water tank holds 3620 litres. 50% of the water is used. How many litres are left?
19. 19.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
20. 20.The price of a school bag changes from ₹2100 to ₹1575. By what percent did it come down?
21. 21.A shop sells 2720 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
22. 22.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
23. 23.The price of a bicycle is ₹260. It goes up by 15%. What is the new price (in ₹)?
24. 24.A water tank holds 2080 litres. 50% of the water is used. How many litres are left?
25. 25.A town has 4100 people. Its population grows by 25%. How many people live there now?
26. 26.The price of a school bag changes from ₹3060 to ₹3825. By what percent did it go up?
27. 27.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
28. 28.The price of a bicycle is ₹2680. It goes up by 40%. What is the new price (in ₹)?
29. 29.The price of a school bag changes from ₹3640 to ₹2548. By what percent did it come down?
30. 30.A price comes down by 20% and then comes down by 50% more. By what percent has it come down in all? =
31. 31.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
32. 32.A water tank holds 3380 litres. 25% of the water is used. How many litres are left?
33. 33.A water tank holds 1140 litres. 30% of the water is used. How many litres are left?
34. 34.A water tank holds 1040 litres. 50% of the water is used. How many litres are left?
35. 35.The price of a school bag changes from ₹4100 to ₹5740. By what percent did it go up?
36. 36.The price of a school bag changes from ₹320 to ₹352. By what percent did it go up?
37. 37.The price of a school bag changes from ₹1180 to ₹1298. By what percent did it go up?
38. 38.The price of a bicycle is ₹2180. It goes up by 15%. What is the new price (in ₹)?
39. 39.The price of a school bag changes from ₹3120 to ₹2808. By what percent did it come down?
40. 40.A price comes down by 40% and then comes down by 50% more. By what percent has it come down in all? =

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