Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 510 · 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 140 litres. 10% of the water is used. How many litres are left?
2. 2.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
3. 3.The price of a school bag changes from ₹1300 to ₹910. By what percent did it come down?
4. 4.A water tank holds 1460 litres. 25% of the water is used. How many litres are left?
5. 5.A water tank holds 160 litres. 30% of the water is used. How many litres are left?
6. 6.The price of a school bag changes from ₹4160 to ₹5408. By what percent did it go up?
7. 7.A town has 3540 people. Its population grows by 50%. How many people live there now?
8. 8.A water tank holds 2260 litres. 20% of the water is used. How many litres are left?
9. 9.A water tank holds 4220 litres. 40% of the water is used. How many litres are left?
10. 10.The price of a bicycle is ₹1800. It goes up by 15%. What is the new price (in ₹)?
11. 11.A price goes up by 30% and then goes up by 15% more. By what percent has it gone up in all? =
12. 12.A shop sells 1740 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
13. 13.A town has 160 people. Its population grows by 30%. How many people live there now?
14. 14.The price of a bicycle is ₹3040. It goes up by 20%. What is the new price (in ₹)?
15. 15.A water tank holds 3240 litres. 5% of the water is used. How many litres are left?
16. 16.A water tank holds 3680 litres. 25% of the water is used. How many litres are left?
17. 17.The price of a school bag changes from ₹2040 to ₹2652. By what percent did it go up?
18. 18.The price of a school bag changes from ₹140 to ₹175. By what percent did it go up?
19. 19.The price of a school bag changes from ₹1180 to ₹1062. By what percent did it come down?
20. 20.The price of a school bag changes from ₹1280 to ₹1920. By what percent did it go up?
21. 21.A water tank holds 4940 litres. 25% of the water is used. How many litres are left?
22. 22.A water tank holds 3740 litres. 30% of the water is used. How many litres are left?
23. 23.A price comes down by 5% and then comes down by 20% more. By what percent has it come down in all? =
24. 24.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
25. 25.The price of a school bag changes from ₹3040 to ₹3952. By what percent did it go up?
26. 26.A water tank holds 2760 litres. 20% of the water is used. How many litres are left?
27. 27.The price of a school bag changes from ₹760 to ₹532. By what percent did it come down?
28. 28.The price of a bicycle is ₹1200. It goes up by 40%. What is the new price (in ₹)?
29. 29.A water tank holds 4200 litres. 5% of the water is used. How many litres are left?
30. 30.The price of a school bag changes from ₹1300 to ₹1560. By what percent did it go up?
31. 31.A shop sells 2920 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
32. 32.A shop sells 3620 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
33. 33.A shop sells 4040 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
34. 34.A town has 3900 people. Its population grows by 15%. How many people live there now?
35. 35.The price of a bicycle is ₹280. It goes up by 25%. What is the new price (in ₹)?
36. 36.A town has 3240 people. Its population grows by 25%. How many people live there now?
37. 37.The price of a bicycle is ₹4920. It goes up by 5%. What is the new price (in ₹)?
38. 38.A town has 4820 people. Its population grows by 50%. How many people live there now?
39. 39.A shop sells 2260 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
40. 40.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =

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