Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 379 · 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 4180 litres. 5% of the water is used. How many litres are left?
2. 2.A water tank holds 4840 litres. 40% of the water is used. How many litres are left?
3. 3.A water tank holds 3940 litres. 10% of the water is used. How many litres are left?
4. 4.A town has 300 people. Its population grows by 30%. How many people live there now?
5. 5.A water tank holds 3080 litres. 40% of the water is used. How many litres are left?
6. 6.The price of a bicycle is ₹3420. It goes up by 40%. What is the new price (in ₹)?
7. 7.A water tank holds 680 litres. 40% of the water is used. How many litres are left?
8. 8.The price of a bicycle is ₹420. It goes up by 25%. What is the new price (in ₹)?
9. 9.A water tank holds 4340 litres. 25% of the water is used. How many litres are left?
10. 10.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
11. 11.A town has 2300 people. Its population grows by 30%. How many people live there now?
12. 12.The price of a school bag changes from ₹220 to ₹275. By what percent did it go up?
13. 13.A town has 4280 people. Its population grows by 20%. How many people live there now?
14. 14.A water tank holds 300 litres. 50% of the water is used. How many litres are left?
15. 15.The price of a school bag changes from ₹1980 to ₹2178. By what percent did it go up?
16. 16.A water tank holds 360 litres. 5% of the water is used. How many litres are left?
17. 17.A shop sells 200 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
18. 18.The price of a bicycle is ₹2460. It goes up by 20%. What is the new price (in ₹)?
19. 19.A town has 960 people. Its population grows by 50%. How many people live there now?
20. 20.A water tank holds 880 litres. 25% of the water is used. How many litres are left?
21. 21.A water tank holds 3080 litres. 5% of the water is used. How many litres are left?
22. 22.A water tank holds 2060 litres. 10% of the water is used. How many litres are left?
23. 23.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
24. 24.A water tank holds 1040 litres. 5% of the water is used. How many litres are left?
25. 25.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
26. 26.The price of a bicycle is ₹4520. It goes up by 30%. What is the new price (in ₹)?
27. 27.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
28. 28.A shop sells 2840 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
29. 29.A water tank holds 3500 litres. 10% of the water is used. How many litres are left?
30. 30.The price of a bicycle is ₹3040. It goes up by 20%. What is the new price (in ₹)?
31. 31.A town has 340 people. Its population grows by 25%. How many people live there now?
32. 32.The price of a school bag changes from ₹840 to ₹1260. By what percent did it go up?
33. 33.The price of a school bag changes from ₹1500 to ₹1275. By what percent did it come down?
34. 34.A price goes up by 40% and then goes up by 20% more. By what percent has it gone up in all? =
35. 35.The price of a school bag changes from ₹2100 to ₹2940. By what percent did it go up?
36. 36.The price of a school bag changes from ₹680 to ₹782. By what percent did it go up?
37. 37.A water tank holds 3500 litres. 30% of the water is used. How many litres are left?
38. 38.The price of a bicycle is ₹3840. It goes up by 20%. What is the new price (in ₹)?
39. 39.A shop sells 1000 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
40. 40.The price of a school bag changes from ₹1380 to ₹828. By what percent did it come down?

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