Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 590 · 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 comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
2. 2.A water tank holds 2260 litres. 50% of the water is used. How many litres are left?
3. 3.A water tank holds 80 litres. 20% of the water is used. How many litres are left?
4. 4.A shop sells 280 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
5. 5.The price of a school bag changes from ₹820 to ₹492. By what percent did it come down?
6. 6.A water tank holds 1320 litres. 20% of the water is used. How many litres are left?
7. 7.A shop sells 1380 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
8. 8.A shop sells 1980 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
9. 9.The price of a school bag changes from ₹3740 to ₹4675. By what percent did it go up?
10. 10.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
11. 11.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
12. 12.A water tank holds 880 litres. 20% of the water is used. How many litres are left?
13. 13.A water tank holds 300 litres. 20% of the water is used. How many litres are left?
14. 14.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
15. 15.The price of a school bag changes from ₹2820 to ₹1692. By what percent did it come down?
16. 16.A shop sells 3160 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
17. 17.A price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
18. 18.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
19. 19.The price of a bicycle is ₹380. It goes up by 30%. What is the new price (in ₹)?
20. 20.A water tank holds 120 litres. 30% of the water is used. How many litres are left?
21. 21.A shop sells 280 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 1680 litres. 50% of the water is used. How many litres are left?
23. 23.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
24. 24.A shop sells 540 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
25. 25.The price of a bicycle is ₹1500. It goes up by 50%. What is the new price (in ₹)?
26. 26.A water tank holds 180 litres. 30% of the water is used. How many litres are left?
27. 27.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
28. 28.The price of a school bag changes from ₹2720 to ₹2312. By what percent did it come down?
29. 29.The price of a school bag changes from ₹2820 to ₹3243. By what percent did it go up?
30. 30.A town has 2200 people. Its population grows by 15%. How many people live there now?
31. 31.The price of a school bag changes from ₹2240 to ₹1568. By what percent did it come down?
32. 32.The price of a bicycle is ₹4740. It goes up by 20%. What is the new price (in ₹)?
33. 33.A water tank holds 3740 litres. 5% of the water is used. How many litres are left?
34. 34.A town has 2320 people. Its population grows by 30%. How many people live there now?
35. 35.The price of a bicycle is ₹2880. It goes up by 5%. What is the new price (in ₹)?
36. 36.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
37. 37.A water tank holds 420 litres. 10% of the water is used. How many litres are left?
38. 38.A water tank holds 2760 litres. 40% of the water is used. How many litres are left?
39. 39.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
40. 40.A town has 3380 people. Its population grows by 20%. How many people live there now?

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