Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 517 · 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. 1.312 increased by 75% =
2. 2.228 increased by 75% =
3. 3.260 decreased by 35% =
4. 4.396 decreased by 25% =
5. 5.620 increased by 60% =
6. 6.208 increased by 25% =
7. 7.325 decreased by 20% =
8. 8.650 increased by 10% =
9. 9.380 increased by 75% =
10. 10.715 decreased by 40% =
11. 11.545 decreased by 60% =
12. 12.95 increased by 40% =
13. 13.472 increased by 25% =
14. 14.246 increased by 50% =
15. 15.415 decreased by 60% =
16. 16.640 increased by 30% =
17. 17.400 decreased by 8% =
18. 18.440 increased by 5% =
19. 19.296 increased by 25% =
20. 20.750 decreased by 8% =
21. 21.240 decreased by 15% =
22. 22.290 increased by 30% =
23. 23.520 increased by 10% =
24. 24.214 increased by 50% =
25. 25.480 increased by 50% =
26. 26.755 decreased by 20% =
27. 27.75 decreased by 60% =
28. 28.475 decreased by 40% =
29. 29.732 increased by 25% =
30. 30.630 increased by 10% =
31. 31.620 increased by 40% =
32. 32.320 increased by 35% =
33. 33.580 decreased by 15% =
34. 34.540 increased by 60% =
35. 35.448 decreased by 75% =
36. 36.40 decreased by 35% =
37. 37.560 decreased by 10% =
38. 38.740 increased by 35% =
39. 39.420 decreased by 60% =
40. 40.588 decreased by 75% =

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