Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 364 · 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. 1.95 increased by 60% =
2. 2.160 decreased by 30% =
3. 3.275 increased by 12% =
4. 4.694 decreased by 50% =
5. 5.440 decreased by 60% =
6. 6.700 decreased by 10% =
7. 7.200 increased by 30% =
8. 8.400 decreased by 20% =
9. 9.430 increased by 30% =
10. 10.252 increased by 25% =
11. 11.480 decreased by 35% =
12. 12.250 decreased by 8% =
13. 13.780 increased by 50% =
14. 14.440 increased by 35% =
15. 15.635 increased by 40% =
16. 16.380 decreased by 5% =
17. 17.710 increased by 30% =
18. 18.440 increased by 15% =
19. 19.676 decreased by 75% =
20. 20.760 increased by 50% =
21. 21.705 increased by 20% =
22. 22.525 decreased by 20% =
23. 23.145 increased by 40% =
24. 24.760 decreased by 15% =
25. 25.495 increased by 20% =
26. 26.275 decreased by 8% =
27. 27.110 decreased by 20% =
28. 28.725 increased by 8% =
29. 29.100 increased by 60% =
30. 30.56 decreased by 75% =
31. 31.610 increased by 10% =
32. 32.340 decreased by 10% =
33. 33.210 increased by 30% =
34. 34.180 decreased by 5% =
35. 35.660 increased by 25% =
36. 36.100 increased by 8% =
37. 37.530 decreased by 10% =
38. 38.385 increased by 20% =
39. 39.460 increased by 30% =
40. 40.260 increased by 5% =

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