Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 472 · 40 questions

The fast method (One-step multiplier): Increase by p%: multiply by (100 + p)% — up 20% is × 1.2. Decrease by p%: multiply by (100 − p)% — down 25% is × 0.75. Easy way to multiply: × the whole number (115 or 75), then ÷ 100.

1. 1.540 decreased by 15% =
2. 2.300 increased by 15% =
3. 3.194 increased by 50% =
4. 4.380 increased by 30% =
5. 5.360 decreased by 15% =
6. 6.245 increased by 20% =
7. 7.610 decreased by 60% =
8. 8.625 decreased by 12% =
9. 9.480 increased by 40% =
10. 10.200 increased by 10% =
11. 11.336 decreased by 25% =
12. 12.425 decreased by 60% =
13. 13.770 decreased by 60% =
14. 14.350 decreased by 8% =
15. 15.700 increased by 35% =
16. 16.580 decreased by 20% =
17. 17.240 decreased by 30% =
18. 18.125 increased by 12% =
19. 19.120 decreased by 10% =
20. 20.500 increased by 35% =
21. 21.285 increased by 20% =
22. 22.712 decreased by 50% =
23. 23.400 increased by 12% =
24. 24.670 increased by 40% =
25. 25.160 increased by 5% =
26. 26.480 increased by 20% =
27. 27.260 decreased by 35% =
28. 28.660 increased by 5% =
29. 29.260 decreased by 5% =
30. 30.208 decreased by 25% =
31. 31.730 increased by 40% =
32. 32.320 decreased by 25% =
33. 33.450 increased by 10% =
34. 34.400 increased by 35% =
35. 35.225 increased by 8% =
36. 36.580 decreased by 10% =
37. 37.600 increased by 10% =
38. 38.65 increased by 40% =
39. 39.720 increased by 15% =
40. 40.160 increased by 15% =

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