Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 430 · 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. 1.700 decreased by 8% =
2. 2.225 decreased by 12% =
3. 3.300 decreased by 8% =
4. 4.205 increased by 40% =
5. 5.272 increased by 75% =
6. 6.575 increased by 20% =
7. 7.425 decreased by 12% =
8. 8.140 decreased by 40% =
9. 9.185 decreased by 60% =
10. 10.150 decreased by 10% =
11. 11.130 decreased by 40% =
12. 12.620 increased by 15% =
13. 13.700 decreased by 60% =
14. 14.400 decreased by 35% =
15. 15.540 increased by 5% =
16. 16.560 increased by 35% =
17. 17.650 decreased by 12% =
18. 18.40 decreased by 75% =
19. 19.725 decreased by 8% =
20. 20.790 decreased by 10% =
21. 21.540 decreased by 5% =
22. 22.180 decreased by 5% =
23. 23.150 increased by 10% =
24. 24.350 increased by 8% =
25. 25.380 decreased by 10% =
26. 26.380 increased by 20% =
27. 27.360 decreased by 15% =
28. 28.220 decreased by 15% =
29. 29.276 increased by 50% =
30. 30.776 increased by 75% =
31. 31.112 increased by 25% =
32. 32.195 decreased by 60% =
33. 33.220 decreased by 35% =
34. 34.700 decreased by 10% =
35. 35.185 increased by 40% =
36. 36.760 increased by 20% =
37. 37.450 decreased by 8% =
38. 38.670 increased by 30% =
39. 39.580 decreased by 15% =
40. 40.100 decreased by 8% =

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