Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 284 · 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. 1.425 decreased by 12% =
2. 2.760 increased by 10% =
3. 3.275 increased by 40% =
4. 4.180 decreased by 40% =
5. 5.550 increased by 12% =
6. 6.740 increased by 15% =
7. 7.740 increased by 5% =
8. 8.360 increased by 5% =
9. 9.260 increased by 35% =
10. 10.380 increased by 35% =
11. 11.780 increased by 30% =
12. 12.430 decreased by 20% =
13. 13.725 increased by 12% =
14. 14.110 increased by 10% =
15. 15.560 decreased by 40% =
16. 16.350 decreased by 8% =
17. 17.120 decreased by 35% =
18. 18.596 decreased by 50% =
19. 19.308 decreased by 75% =
20. 20.520 increased by 35% =
21. 21.175 decreased by 12% =
22. 22.762 increased by 50% =
23. 23.310 increased by 60% =
24. 24.685 increased by 40% =
25. 25.450 increased by 8% =
26. 26.190 decreased by 20% =
27. 27.360 decreased by 30% =
28. 28.300 decreased by 35% =
29. 29.425 increased by 60% =
30. 30.620 increased by 30% =
31. 31.330 increased by 10% =
32. 32.220 increased by 5% =
33. 33.760 decreased by 5% =
34. 34.96 increased by 75% =
35. 35.60 decreased by 30% =
36. 36.300 increased by 15% =
37. 37.720 decreased by 5% =
38. 38.150 increased by 60% =
39. 39.780 decreased by 15% =
40. 40.220 increased by 30% =

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