Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 973 · 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. 1.750 decreased by 12% =
2. 2.560 increased by 40% =
3. 3.60 decreased by 35% =
4. 4.380 increased by 20% =
5. 5.125 decreased by 8% =
6. 6.84 decreased by 25% =
7. 7.390 decreased by 60% =
8. 8.560 increased by 20% =
9. 9.136 increased by 50% =
10. 10.125 increased by 40% =
11. 11.710 decreased by 40% =
12. 12.545 decreased by 40% =
13. 13.240 decreased by 10% =
14. 14.770 increased by 60% =
15. 15.140 decreased by 30% =
16. 16.208 decreased by 25% =
17. 17.300 increased by 50% =
18. 18.260 increased by 20% =
19. 19.52 decreased by 75% =
20. 20.660 increased by 30% =
21. 21.380 decreased by 15% =
22. 22.344 increased by 75% =
23. 23.502 increased by 50% =
24. 24.435 increased by 60% =
25. 25.325 increased by 8% =
26. 26.760 decreased by 15% =
27. 27.320 decreased by 10% =
28. 28.48 decreased by 75% =
29. 29.45 decreased by 40% =
30. 30.225 decreased by 12% =
31. 31.204 increased by 75% =
32. 32.40 decreased by 10% =
33. 33.550 decreased by 12% =
34. 34.40 increased by 35% =
35. 35.60 increased by 35% =
36. 36.160 increased by 10% =
37. 37.625 decreased by 8% =
38. 38.275 decreased by 12% =
39. 39.150 decreased by 8% =
40. 40.140 decreased by 15% =

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