Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 317 · 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 price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
2. 2.A water tank holds 3320 litres. 20% of the water is used. How many litres are left?
3. 3.A water tank holds 160 litres. 10% of the water is used. How many litres are left?
4. 4.A water tank holds 1860 litres. 40% of the water is used. How many litres are left?
5. 5.A water tank holds 1020 litres. 15% of the water is used. How many litres are left?
6. 6.The price of a school bag changes from ₹440 to ₹396. By what percent did it come down?
7. 7.A water tank holds 1720 litres. 30% of the water is used. How many litres are left?
8. 8.A water tank holds 3440 litres. 40% of the water is used. How many litres are left?
9. 9.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
10. 10.A water tank holds 2700 litres. 25% of the water is used. How many litres are left?
11. 11.The price of a bicycle is ₹2940. It goes up by 5%. What is the new price (in ₹)?
12. 12.The price of a bicycle is ₹580. It goes up by 15%. What is the new price (in ₹)?
13. 13.A water tank holds 1080 litres. 20% of the water is used. How many litres are left?
14. 14.The price of a bicycle is ₹4920. It goes up by 30%. What is the new price (in ₹)?
15. 15.A water tank holds 2720 litres. 10% of the water is used. How many litres are left?
16. 16.A water tank holds 3420 litres. 10% of the water is used. How many litres are left?
17. 17.A town has 2980 people. Its population grows by 15%. How many people live there now?
18. 18.A water tank holds 4840 litres. 10% of the water is used. How many litres are left?
19. 19.The price of a school bag changes from ₹3660 to ₹3843. By what percent did it go up?
20. 20.The price of a bicycle is ₹2360. It goes up by 40%. What is the new price (in ₹)?
21. 21.A shop sells 1340 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
22. 22.A water tank holds 1600 litres. 5% of the water is used. How many litres are left?
23. 23.The price of a bicycle is ₹4640. It goes up by 25%. What is the new price (in ₹)?
24. 24.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
25. 25.The price of a bicycle is ₹3700. It goes up by 5%. What is the new price (in ₹)?
26. 26.The price of a school bag changes from ₹1520 to ₹1672. By what percent did it go up?
27. 27.The price of a bicycle is ₹660. It goes up by 20%. What is the new price (in ₹)?
28. 28.A price goes up by 40% and then goes up by 50% more. By what percent has it gone up in all? =
29. 29.A price goes up by 40% and then comes down by 25%. By what percent has it gone up in all? =
30. 30.A water tank holds 3120 litres. 20% of the water is used. How many litres are left?
31. 31.The price of a school bag changes from ₹2560 to ₹3072. By what percent did it go up?
32. 32.The price of a school bag changes from ₹3980 to ₹5174. By what percent did it go up?
33. 33.A price goes up by 5% and then goes up by 50% more. By what percent has it gone up in all? =
34. 34.A water tank holds 2120 litres. 50% of the water is used. How many litres are left?
35. 35.The price of a school bag changes from ₹3280 to ₹3772. By what percent did it go up?
36. 36.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
37. 37.A town has 2980 people. Its population grows by 5%. How many people live there now?
38. 38.A price comes down by 40% and then comes down by 30% more. By what percent has it come down in all? =
39. 39.A shop sells 2200 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
40. 40.A water tank holds 1900 litres. 10% of the water is used. How many litres are left?

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