Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 604 · 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. 1.600 increased by 8% =
2. 2.460 increased by 35% =
3. 3.375 increased by 12% =
4. 4.585 decreased by 20% =
5. 5.620 increased by 30% =
6. 6.680 decreased by 15% =
7. 7.210 increased by 10% =
8. 8.732 decreased by 75% =
9. 9.168 increased by 25% =
10. 10.100 increased by 25% =
11. 11.496 increased by 25% =
12. 12.580 increased by 30% =
13. 13.75 decreased by 8% =
14. 14.600 increased by 20% =
15. 15.740 increased by 10% =
16. 16.690 decreased by 10% =
17. 17.520 decreased by 35% =
18. 18.154 decreased by 50% =
19. 19.275 increased by 8% =
20. 20.784 increased by 75% =
21. 21.575 increased by 20% =
22. 22.460 increased by 15% =
23. 23.425 decreased by 8% =
24. 24.80 decreased by 50% =
25. 25.780 increased by 30% =
26. 26.420 increased by 60% =
27. 27.100 decreased by 12% =
28. 28.550 increased by 60% =
29. 29.610 decreased by 50% =
30. 30.410 increased by 40% =
31. 31.325 decreased by 8% =
32. 32.632 decreased by 75% =
33. 33.325 increased by 12% =
34. 34.750 decreased by 8% =
35. 35.112 decreased by 25% =
36. 36.116 decreased by 50% =
37. 37.225 increased by 8% =
38. 38.440 increased by 50% =
39. 39.385 increased by 20% =
40. 40.450 decreased by 50% =

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