Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 202 · 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. 1.644 decreased by 75% =
2. 2.210 increased by 30% =
3. 3.144 increased by 25% =
4. 4.725 increased by 8% =
5. 5.332 increased by 25% =
6. 6.680 decreased by 10% =
7. 7.450 decreased by 12% =
8. 8.220 decreased by 75% =
9. 9.560 decreased by 5% =
10. 10.260 decreased by 5% =
11. 11.468 decreased by 75% =
12. 12.108 decreased by 75% =
13. 13.780 increased by 15% =
14. 14.490 decreased by 50% =
15. 15.640 decreased by 25% =
16. 16.395 decreased by 40% =
17. 17.180 increased by 5% =
18. 18.700 decreased by 25% =
19. 19.490 increased by 60% =
20. 20.480 decreased by 35% =
21. 21.790 increased by 30% =
22. 22.200 increased by 75% =
23. 23.794 increased by 50% =
24. 24.40 decreased by 15% =
25. 25.600 increased by 12% =
26. 26.794 increased by 50% =
27. 27.585 increased by 20% =
28. 28.640 increased by 50% =
29. 29.360 decreased by 5% =
30. 30.280 increased by 5% =
31. 31.440 increased by 25% =
32. 32.160 decreased by 75% =
33. 33.680 decreased by 30% =
34. 34.752 increased by 75% =
35. 35.340 increased by 5% =
36. 36.450 increased by 30% =
37. 37.240 decreased by 15% =
38. 38.290 increased by 10% =
39. 39.140 decreased by 15% =
40. 40.440 increased by 5% =

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