Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 311 · 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. 1.650 increased by 12% =
2. 2.190 increased by 40% =
3. 3.556 increased by 25% =
4. 4.100 decreased by 8% =
5. 5.125 decreased by 20% =
6. 6.620 increased by 5% =
7. 7.260 decreased by 10% =
8. 8.460 decreased by 10% =
9. 9.252 decreased by 75% =
10. 10.196 decreased by 75% =
11. 11.532 decreased by 25% =
12. 12.540 decreased by 30% =
13. 13.800 decreased by 10% =
14. 14.588 increased by 75% =
15. 15.380 increased by 35% =
16. 16.208 increased by 50% =
17. 17.320 decreased by 30% =
18. 18.480 increased by 35% =
19. 19.40 decreased by 50% =
20. 20.540 increased by 75% =
21. 21.650 increased by 12% =
22. 22.290 decreased by 30% =
23. 23.790 decreased by 20% =
24. 24.704 decreased by 75% =
25. 25.300 increased by 30% =
26. 26.480 increased by 5% =
27. 27.248 decreased by 25% =
28. 28.250 decreased by 8% =
29. 29.555 increased by 20% =
30. 30.85 decreased by 40% =
31. 31.630 increased by 10% =
32. 32.540 increased by 5% =
33. 33.225 decreased by 12% =
34. 34.350 increased by 60% =
35. 35.625 increased by 8% =
36. 36.670 decreased by 20% =
37. 37.330 decreased by 30% =
38. 38.80 decreased by 25% =
39. 39.425 decreased by 60% =
40. 40.460 increased by 5% =

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