Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 3 · 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 town has 3060 people. Its population grows by 20%. How many people live there now?
2. 2.A town has 4860 people. Its population grows by 50%. How many people live there now?
3. 3.The price of a bicycle is ₹2600. It goes up by 50%. What is the new price (in ₹)?
4. 4.A price comes down by 15% and then comes down by 5% more. By what percent has it come down in all? =
5. 5.A water tank holds 3640 litres. 25% of the water is used. How many litres are left?
6. 6.A water tank holds 4420 litres. 10% of the water is used. How many litres are left?
7. 7.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
8. 8.A town has 3660 people. Its population grows by 5%. How many people live there now?
9. 9.A water tank holds 3680 litres. 50% of the water is used. How many litres are left?
10. 10.A price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
11. 11.A town has 1780 people. Its population grows by 10%. How many people live there now?
12. 12.The price of a school bag changes from ₹80 to ₹120. By what percent did it go up?
13. 13.The price of a bicycle is ₹4040. It goes up by 5%. What is the new price (in ₹)?
14. 14.A water tank holds 2760 litres. 15% of the water is used. How many litres are left?
15. 15.The price of a bicycle is ₹280. It goes up by 15%. What is the new price (in ₹)?
16. 16.A water tank holds 4320 litres. 40% of the water is used. How many litres are left?
17. 17.The price of a school bag changes from ₹3180 to ₹2703. By what percent did it come down?
18. 18.A town has 1400 people. Its population grows by 5%. How many people live there now?
19. 19.A town has 2060 people. Its population grows by 50%. How many people live there now?
20. 20.The price of a school bag changes from ₹3220 to ₹3864. By what percent did it go up?
21. 21.A town has 1960 people. Its population grows by 10%. How many people live there now?
22. 22.The price of a bicycle is ₹4240. It goes up by 40%. What is the new price (in ₹)?
23. 23.A price goes up by 10% and then goes up by 40% more. By what percent has it gone up in all? =
24. 24.The price of a school bag changes from ₹1220 to ₹1342. By what percent did it go up?
25. 25.The price of a school bag changes from ₹2400 to ₹3120. By what percent did it go up?
26. 26.A town has 2720 people. Its population grows by 5%. How many people live there now?
27. 27.The price of a school bag changes from ₹740 to ₹703. By what percent did it come down?
28. 28.A water tank holds 4980 litres. 10% of the water is used. How many litres are left?
29. 29.A water tank holds 2760 litres. 50% of the water is used. How many litres are left?
30. 30.The price of a school bag changes from ₹2080 to ₹3120. By what percent did it go up?
31. 31.A shop sells 3140 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
32. 32.A town has 3900 people. Its population grows by 15%. How many people live there now?
33. 33.The price of a bicycle is ₹4340. It goes up by 5%. What is the new price (in ₹)?
34. 34.The price of a school bag changes from ₹80 to ₹96. By what percent did it go up?
35. 35.The price of a school bag changes from ₹1100 to ₹1540. By what percent did it go up?
36. 36.The price of a bicycle is ₹4100. It goes up by 5%. What is the new price (in ₹)?
37. 37.A water tank holds 2720 litres. 20% of the water is used. How many litres are left?
38. 38.The price of a school bag changes from ₹1960 to ₹2940. By what percent did it go up?
39. 39.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
40. 40.A water tank holds 420 litres. 15% of the water is used. How many litres are left?

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