Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 205 · 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. 1.475 decreased by 20% =
2. 2.560 decreased by 60% =
3. 3.195 increased by 20% =
4. 4.225 increased by 12% =
5. 5.208 increased by 50% =
6. 6.65 decreased by 40% =
7. 7.310 decreased by 40% =
8. 8.350 increased by 20% =
9. 9.180 decreased by 20% =
10. 10.215 increased by 60% =
11. 11.224 decreased by 50% =
12. 12.340 increased by 40% =
13. 13.384 increased by 25% =
14. 14.210 decreased by 10% =
15. 15.300 decreased by 5% =
16. 16.540 increased by 5% =
17. 17.752 decreased by 25% =
18. 18.160 increased by 35% =
19. 19.336 increased by 25% =
20. 20.660 decreased by 35% =
21. 21.680 decreased by 30% =
22. 22.530 decreased by 10% =
23. 23.648 increased by 75% =
24. 24.585 increased by 40% =
25. 25.172 decreased by 25% =
26. 26.676 increased by 25% =
27. 27.540 decreased by 15% =
28. 28.130 increased by 30% =
29. 29.60 decreased by 60% =
30. 30.150 increased by 12% =
31. 31.610 increased by 20% =
32. 32.495 increased by 20% =
33. 33.520 increased by 5% =
34. 34.652 increased by 75% =
35. 35.750 decreased by 20% =
36. 36.320 decreased by 35% =
37. 37.685 increased by 20% =
38. 38.410 decreased by 60% =
39. 39.495 increased by 40% =
40. 40.110 decreased by 60% =

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