Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 804 · 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. 1.230 increased by 40% =
2. 2.360 increased by 10% =
3. 3.740 increased by 60% =
4. 4.445 increased by 20% =
5. 5.610 increased by 50% =
6. 6.445 decreased by 40% =
7. 7.180 decreased by 15% =
8. 8.75 decreased by 12% =
9. 9.440 decreased by 75% =
10. 10.670 decreased by 60% =
11. 11.776 increased by 75% =
12. 12.560 decreased by 5% =
13. 13.740 decreased by 5% =
14. 14.380 increased by 30% =
15. 15.260 increased by 25% =
16. 16.190 decreased by 10% =
17. 17.450 decreased by 50% =
18. 18.395 increased by 60% =
19. 19.750 decreased by 12% =
20. 20.800 decreased by 35% =
21. 21.328 decreased by 50% =
22. 22.455 decreased by 20% =
23. 23.592 increased by 75% =
24. 24.50 decreased by 30% =
25. 25.40 decreased by 5% =
26. 26.464 decreased by 25% =
27. 27.220 decreased by 15% =
28. 28.525 decreased by 12% =
29. 29.660 increased by 15% =
30. 30.248 decreased by 50% =
31. 31.525 increased by 12% =
32. 32.40 increased by 35% =
33. 33.680 increased by 60% =
34. 34.555 increased by 20% =
35. 35.510 increased by 60% =
36. 36.510 decreased by 60% =
37. 37.720 increased by 30% =
38. 38.45 increased by 40% =
39. 39.220 decreased by 15% =
40. 40.600 increased by 12% =

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