Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 860 · 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. 1.685 decreased by 60% =
2. 2.760 decreased by 35% =
3. 3.92 increased by 50% =
4. 4.125 decreased by 12% =
5. 5.280 decreased by 5% =
6. 6.440 decreased by 35% =
7. 7.368 increased by 25% =
8. 8.580 increased by 35% =
9. 9.610 decreased by 10% =
10. 10.40 increased by 10% =
11. 11.748 decreased by 75% =
12. 12.250 decreased by 10% =
13. 13.540 increased by 25% =
14. 14.200 increased by 30% =
15. 15.250 decreased by 12% =
16. 16.520 decreased by 10% =
17. 17.325 increased by 12% =
18. 18.440 increased by 35% =
19. 19.785 decreased by 20% =
20. 20.56 increased by 75% =
21. 21.275 decreased by 12% =
22. 22.640 increased by 10% =
23. 23.535 increased by 60% =
24. 24.745 decreased by 40% =
25. 25.328 decreased by 75% =
26. 26.180 decreased by 5% =
27. 27.348 decreased by 25% =
28. 28.500 decreased by 15% =
29. 29.225 decreased by 12% =
30. 30.420 decreased by 5% =
31. 31.785 increased by 40% =
32. 32.305 decreased by 40% =
33. 33.475 decreased by 12% =
34. 34.615 increased by 40% =
35. 35.50 decreased by 30% =
36. 36.575 decreased by 20% =
37. 37.770 decreased by 40% =
38. 38.100 decreased by 60% =
39. 39.720 decreased by 5% =
40. 40.585 increased by 40% =

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