Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 518 · 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. 1.260 decreased by 5% =
2. 2.250 increased by 12% =
3. 3.130 decreased by 10% =
4. 4.320 increased by 35% =
5. 5.590 increased by 20% =
6. 6.680 increased by 10% =
7. 7.84 increased by 75% =
8. 8.575 decreased by 12% =
9. 9.615 decreased by 40% =
10. 10.200 increased by 35% =
11. 11.745 increased by 40% =
12. 12.704 increased by 50% =
13. 13.175 decreased by 12% =
14. 14.435 increased by 40% =
15. 15.600 increased by 15% =
16. 16.410 increased by 10% =
17. 17.130 decreased by 30% =
18. 18.528 decreased by 25% =
19. 19.560 increased by 15% =
20. 20.360 increased by 15% =
21. 21.786 decreased by 50% =
22. 22.320 decreased by 35% =
23. 23.390 increased by 10% =
24. 24.620 decreased by 15% =
25. 25.180 increased by 10% =
26. 26.520 increased by 10% =
27. 27.460 decreased by 75% =
28. 28.244 increased by 25% =
29. 29.475 decreased by 8% =
30. 30.680 decreased by 60% =
31. 31.385 increased by 60% =
32. 32.525 decreased by 12% =
33. 33.460 increased by 5% =
34. 34.240 decreased by 25% =
35. 35.110 increased by 10% =
36. 36.775 decreased by 8% =
37. 37.80 increased by 35% =
38. 38.60 decreased by 20% =
39. 39.534 increased by 50% =
40. 40.230 decreased by 20% =

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