Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 110 · 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. 1.280 decreased by 5% =
2. 2.260 increased by 35% =
3. 3.216 decreased by 25% =
4. 4.120 decreased by 25% =
5. 5.440 decreased by 40% =
6. 6.280 decreased by 10% =
7. 7.50 decreased by 8% =
8. 8.340 decreased by 15% =
9. 9.245 decreased by 60% =
10. 10.760 increased by 5% =
11. 11.680 decreased by 35% =
12. 12.770 decreased by 10% =
13. 13.400 increased by 5% =
14. 14.175 increased by 12% =
15. 15.564 increased by 75% =
16. 16.160 increased by 15% =
17. 17.420 increased by 15% =
18. 18.360 decreased by 5% =
19. 19.332 increased by 75% =
20. 20.520 increased by 35% =
21. 21.660 decreased by 35% =
22. 22.540 increased by 75% =
23. 23.620 increased by 10% =
24. 24.440 increased by 15% =
25. 25.375 increased by 60% =
26. 26.160 decreased by 15% =
27. 27.418 decreased by 50% =
28. 28.484 increased by 25% =
29. 29.140 decreased by 15% =
30. 30.295 decreased by 40% =
31. 31.400 increased by 5% =
32. 32.195 decreased by 20% =
33. 33.180 increased by 35% =
34. 34.275 increased by 8% =
35. 35.220 increased by 35% =
36. 36.520 increased by 15% =
37. 37.190 increased by 30% =
38. 38.172 increased by 50% =
39. 39.240 increased by 35% =
40. 40.625 increased by 12% =

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