Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 849 · 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. 1.140 increased by 10% =
2. 2.140 increased by 15% =
3. 3.720 decreased by 5% =
4. 4.200 decreased by 12% =
5. 5.176 increased by 25% =
6. 6.92 increased by 75% =
7. 7.280 decreased by 5% =
8. 8.700 decreased by 35% =
9. 9.630 increased by 30% =
10. 10.475 increased by 8% =
11. 11.648 increased by 25% =
12. 12.160 decreased by 75% =
13. 13.500 increased by 10% =
14. 14.100 increased by 12% =
15. 15.720 decreased by 5% =
16. 16.625 increased by 40% =
17. 17.784 increased by 25% =
18. 18.525 decreased by 8% =
19. 19.256 increased by 25% =
20. 20.625 decreased by 12% =
21. 21.460 decreased by 35% =
22. 22.254 increased by 50% =
23. 23.224 increased by 75% =
24. 24.175 increased by 8% =
25. 25.205 increased by 20% =
26. 26.600 decreased by 12% =
27. 27.536 increased by 75% =
28. 28.70 increased by 10% =
29. 29.540 increased by 30% =
30. 30.584 decreased by 75% =
31. 31.200 decreased by 30% =
32. 32.520 increased by 15% =
33. 33.510 decreased by 60% =
34. 34.250 increased by 20% =
35. 35.725 increased by 40% =
36. 36.440 decreased by 20% =
37. 37.640 increased by 5% =
38. 38.600 decreased by 5% =
39. 39.495 decreased by 40% =
40. 40.360 decreased by 75% =

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