Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 714 · 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. 1.584 decreased by 75% =
2. 2.450 decreased by 12% =
3. 3.496 decreased by 50% =
4. 4.755 decreased by 40% =
5. 5.500 decreased by 10% =
6. 6.324 increased by 75% =
7. 7.214 decreased by 50% =
8. 8.665 increased by 20% =
9. 9.700 increased by 5% =
10. 10.440 decreased by 75% =
11. 11.320 increased by 35% =
12. 12.80 decreased by 75% =
13. 13.440 increased by 30% =
14. 14.305 increased by 40% =
15. 15.575 increased by 12% =
16. 16.120 increased by 25% =
17. 17.60 decreased by 75% =
18. 18.520 increased by 60% =
19. 19.700 decreased by 10% =
20. 20.680 decreased by 20% =
21. 21.480 increased by 5% =
22. 22.180 increased by 5% =
23. 23.88 decreased by 50% =
24. 24.40 increased by 5% =
25. 25.350 increased by 40% =
26. 26.760 increased by 30% =
27. 27.400 decreased by 12% =
28. 28.705 increased by 40% =
29. 29.140 decreased by 50% =
30. 30.720 increased by 40% =
31. 31.350 decreased by 12% =
32. 32.196 increased by 25% =
33. 33.260 decreased by 15% =
34. 34.130 increased by 10% =
35. 35.352 increased by 50% =
36. 36.680 increased by 10% =
37. 37.445 increased by 20% =
38. 38.750 decreased by 8% =
39. 39.640 decreased by 40% =
40. 40.700 increased by 8% =

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