Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 987 · 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. 1.775 increased by 8% =
2. 2.140 decreased by 15% =
3. 3.296 increased by 75% =
4. 4.650 decreased by 8% =
5. 5.92 increased by 75% =
6. 6.175 decreased by 8% =
7. 7.265 increased by 20% =
8. 8.710 decreased by 10% =
9. 9.692 increased by 75% =
10. 10.790 increased by 10% =
11. 11.660 decreased by 35% =
12. 12.325 increased by 20% =
13. 13.775 decreased by 60% =
14. 14.75 increased by 12% =
15. 15.350 increased by 60% =
16. 16.246 increased by 50% =
17. 17.200 increased by 15% =
18. 18.425 increased by 40% =
19. 19.152 decreased by 75% =
20. 20.610 increased by 20% =
21. 21.120 decreased by 30% =
22. 22.508 increased by 75% =
23. 23.750 decreased by 8% =
24. 24.116 increased by 25% =
25. 25.256 decreased by 75% =
26. 26.410 decreased by 50% =
27. 27.445 increased by 60% =
28. 28.360 increased by 5% =
29. 29.100 increased by 15% =
30. 30.52 increased by 50% =
31. 31.625 increased by 8% =
32. 32.100 increased by 5% =
33. 33.485 decreased by 40% =
34. 34.690 increased by 40% =
35. 35.50 increased by 12% =
36. 36.200 decreased by 12% =
37. 37.475 increased by 8% =
38. 38.380 increased by 20% =
39. 39.298 increased by 50% =
40. 40.390 increased by 10% =

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