Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 783 · 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. 1.396 decreased by 25% =
2. 2.210 decreased by 10% =
3. 3.80 decreased by 10% =
4. 4.296 increased by 75% =
5. 5.516 increased by 50% =
6. 6.408 increased by 75% =
7. 7.502 decreased by 50% =
8. 8.140 increased by 10% =
9. 9.604 increased by 50% =
10. 10.384 increased by 50% =
11. 11.350 increased by 8% =
12. 12.140 decreased by 40% =
13. 13.50 increased by 12% =
14. 14.108 decreased by 50% =
15. 15.160 increased by 15% =
16. 16.710 increased by 20% =
17. 17.630 decreased by 30% =
18. 18.735 increased by 40% =
19. 19.750 decreased by 50% =
20. 20.530 increased by 60% =
21. 21.520 decreased by 60% =
22. 22.50 decreased by 10% =
23. 23.50 increased by 8% =
24. 24.40 decreased by 35% =
25. 25.740 increased by 50% =
26. 26.380 increased by 35% =
27. 27.640 decreased by 15% =
28. 28.360 increased by 15% =
29. 29.300 decreased by 30% =
30. 30.50 decreased by 12% =
31. 31.260 increased by 15% =
32. 32.160 increased by 5% =
33. 33.275 increased by 12% =
34. 34.215 increased by 40% =
35. 35.208 increased by 25% =
36. 36.300 decreased by 12% =
37. 37.200 increased by 50% =
38. 38.440 increased by 35% =
39. 39.580 decreased by 25% =
40. 40.520 decreased by 75% =

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