Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 247 · 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. 1.435 increased by 60% =
2. 2.540 increased by 25% =
3. 3.40 decreased by 35% =
4. 4.440 increased by 5% =
5. 5.60 decreased by 35% =
6. 6.725 increased by 12% =
7. 7.380 decreased by 35% =
8. 8.410 increased by 40% =
9. 9.52 increased by 25% =
10. 10.440 decreased by 5% =
11. 11.272 decreased by 75% =
12. 12.500 decreased by 8% =
13. 13.585 increased by 20% =
14. 14.68 increased by 75% =
15. 15.490 increased by 20% =
16. 16.475 increased by 12% =
17. 17.150 decreased by 60% =
18. 18.140 decreased by 15% =
19. 19.548 increased by 25% =
20. 20.160 decreased by 35% =
21. 21.556 increased by 25% =
22. 22.140 increased by 30% =
23. 23.100 decreased by 5% =
24. 24.345 increased by 20% =
25. 25.460 decreased by 35% =
26. 26.800 increased by 10% =
27. 27.240 decreased by 5% =
28. 28.500 decreased by 8% =
29. 29.660 increased by 15% =
30. 30.100 decreased by 8% =
31. 31.424 increased by 50% =
32. 32.260 increased by 15% =
33. 33.700 decreased by 8% =
34. 34.475 decreased by 40% =
35. 35.640 increased by 35% =
36. 36.430 increased by 10% =
37. 37.755 increased by 40% =
38. 38.770 increased by 20% =
39. 39.712 decreased by 50% =
40. 40.684 increased by 75% =

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