Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 172 · 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. 1.220 increased by 15% =
2. 2.600 increased by 8% =
3. 3.760 decreased by 30% =
4. 4.320 decreased by 30% =
5. 5.692 decreased by 25% =
6. 6.625 decreased by 8% =
7. 7.784 decreased by 25% =
8. 8.320 increased by 10% =
9. 9.410 decreased by 10% =
10. 10.620 increased by 5% =
11. 11.750 increased by 40% =
12. 12.116 decreased by 50% =
13. 13.108 increased by 25% =
14. 14.550 increased by 8% =
15. 15.660 increased by 10% =
16. 16.800 decreased by 15% =
17. 17.765 increased by 60% =
18. 18.756 decreased by 50% =
19. 19.558 decreased by 50% =
20. 20.780 decreased by 5% =
21. 21.340 increased by 15% =
22. 22.720 increased by 35% =
23. 23.125 decreased by 60% =
24. 24.236 decreased by 50% =
25. 25.336 decreased by 25% =
26. 26.140 increased by 50% =
27. 27.200 decreased by 25% =
28. 28.725 increased by 12% =
29. 29.440 decreased by 50% =
30. 30.184 increased by 75% =
31. 31.240 decreased by 5% =
32. 32.100 increased by 35% =
33. 33.412 decreased by 75% =
34. 34.740 decreased by 15% =
35. 35.60 decreased by 25% =
36. 36.212 increased by 50% =
37. 37.560 decreased by 5% =
38. 38.525 increased by 12% =
39. 39.750 increased by 30% =
40. 40.200 decreased by 5% =

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