Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 643 · 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. 1.250 decreased by 12% =
2. 2.670 decreased by 10% =
3. 3.268 increased by 75% =
4. 4.332 decreased by 25% =
5. 5.540 increased by 5% =
6. 6.480 decreased by 5% =
7. 7.284 decreased by 75% =
8. 8.500 decreased by 35% =
9. 9.780 decreased by 10% =
10. 10.195 increased by 60% =
11. 11.425 decreased by 12% =
12. 12.65 decreased by 40% =
13. 13.60 increased by 10% =
14. 14.144 decreased by 25% =
15. 15.110 increased by 40% =
16. 16.460 increased by 50% =
17. 17.225 increased by 8% =
18. 18.695 decreased by 60% =
19. 19.60 increased by 25% =
20. 20.260 increased by 15% =
21. 21.228 increased by 25% =
22. 22.240 increased by 35% =
23. 23.480 increased by 30% =
24. 24.672 increased by 25% =
25. 25.185 increased by 40% =
26. 26.220 decreased by 15% =
27. 27.380 increased by 25% =
28. 28.520 increased by 5% =
29. 29.740 decreased by 35% =
30. 30.560 decreased by 35% =
31. 31.240 increased by 15% =
32. 32.472 increased by 75% =
33. 33.575 decreased by 60% =
34. 34.266 increased by 50% =
35. 35.388 decreased by 25% =
36. 36.750 increased by 40% =
37. 37.400 increased by 35% =
38. 38.680 decreased by 35% =
39. 39.180 increased by 15% =
40. 40.170 increased by 10% =

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