Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 135 · 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. 1.525 increased by 8% =
2. 2.220 increased by 40% =
3. 3.535 decreased by 20% =
4. 4.150 increased by 12% =
5. 5.220 decreased by 10% =
6. 6.130 increased by 40% =
7. 7.685 decreased by 40% =
8. 8.540 increased by 40% =
9. 9.790 decreased by 30% =
10. 10.795 decreased by 60% =
11. 11.670 decreased by 20% =
12. 12.560 increased by 5% =
13. 13.312 increased by 50% =
14. 14.240 increased by 15% =
15. 15.748 increased by 25% =
16. 16.516 decreased by 50% =
17. 17.275 increased by 8% =
18. 18.420 increased by 15% =
19. 19.780 decreased by 15% =
20. 20.632 decreased by 25% =
21. 21.430 increased by 30% =
22. 22.360 decreased by 5% =
23. 23.40 decreased by 5% =
24. 24.300 decreased by 8% =
25. 25.400 decreased by 15% =
26. 26.620 increased by 5% =
27. 27.365 increased by 60% =
28. 28.720 increased by 35% =
29. 29.540 decreased by 5% =
30. 30.700 increased by 5% =
31. 31.280 decreased by 35% =
32. 32.60 decreased by 40% =
33. 33.775 increased by 12% =
34. 34.260 increased by 40% =
35. 35.380 decreased by 25% =
36. 36.194 decreased by 50% =
37. 37.260 decreased by 5% =
38. 38.110 increased by 10% =
39. 39.156 decreased by 50% =
40. 40.200 decreased by 8% =

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