Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 527 · 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 10% and then goes up by 10% more. By what percent has it gone up in all? =
2. 2.A water tank holds 2140 litres. 25% of the water is used. How many litres are left?
3. 3.A water tank holds 700 litres. 20% of the water is used. How many litres are left?
4. 4.A water tank holds 4580 litres. 40% of the water is used. How many litres are left?
5. 5.A water tank holds 400 litres. 30% of the water is used. How many litres are left?
6. 6.The price of a school bag changes from ₹3840 to ₹4224. By what percent did it go up?
7. 7.A shop sells 4260 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
8. 8.A town has 2740 people. Its population grows by 10%. How many people live there now?
9. 9.A water tank holds 4220 litres. 15% of the water is used. How many litres are left?
10. 10.The price of a school bag changes from ₹2640 to ₹3036. By what percent did it go up?
11. 11.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
12. 12.The price of a school bag changes from ₹1860 to ₹1116. By what percent did it come down?
13. 13.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
14. 14.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
15. 15.A water tank holds 420 litres. 50% of the water is used. How many litres are left?
16. 16.The price of a school bag changes from ₹1460 to ₹730. By what percent did it come down?
17. 17.A water tank holds 900 litres. 10% of the water is used. How many litres are left?
18. 18.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
19. 19.A water tank holds 2840 litres. 15% of the water is used. How many litres are left?
20. 20.The price of a bicycle is ₹3560. It goes up by 15%. What is the new price (in ₹)?
21. 21.The price of a bicycle is ₹2040. It goes up by 20%. What is the new price (in ₹)?
22. 22.The price of a school bag changes from ₹2020 to ₹2222. By what percent did it go up?
23. 23.A shop sells 3200 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
24. 24.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
25. 25.A shop sells 3120 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
26. 26.A shop sells 840 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
27. 27.A water tank holds 4160 litres. 30% of the water is used. How many litres are left?
28. 28.A town has 280 people. Its population grows by 25%. How many people live there now?
29. 29.A shop sells 4460 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
30. 30.The price of a school bag changes from ₹4200 to ₹4410. By what percent did it go up?
31. 31.The price of a bicycle is ₹1460. It goes up by 25%. What is the new price (in ₹)?
32. 32.The price of a school bag changes from ₹3700 to ₹3885. By what percent did it go up?
33. 33.A town has 1140 people. Its population grows by 15%. How many people live there now?
34. 34.A town has 680 people. Its population grows by 5%. How many people live there now?
35. 35.The price of a bicycle is ₹4380. It goes up by 5%. What is the new price (in ₹)?
36. 36.The price of a school bag changes from ₹660 to ₹825. By what percent did it go up?
37. 37.A town has 500 people. Its population grows by 50%. How many people live there now?
38. 38.A water tank holds 4080 litres. 30% of the water is used. How many litres are left?
39. 39.A water tank holds 2140 litres. 40% of the water is used. How many litres are left?
40. 40.The price of a bicycle is ₹2120. It goes up by 30%. What is the new price (in ₹)?

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