Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 664 · 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. 1.325 increased by 8% =
2. 2.288 increased by 25% =
3. 3.325 increased by 40% =
4. 4.60 increased by 75% =
5. 5.155 increased by 60% =
6. 6.190 decreased by 60% =
7. 7.760 increased by 15% =
8. 8.300 decreased by 12% =
9. 9.175 decreased by 12% =
10. 10.180 decreased by 15% =
11. 11.470 decreased by 10% =
12. 12.285 decreased by 20% =
13. 13.600 increased by 15% =
14. 14.360 increased by 35% =
15. 15.490 increased by 30% =
16. 16.175 increased by 8% =
17. 17.220 decreased by 15% =
18. 18.460 increased by 20% =
19. 19.620 increased by 5% =
20. 20.800 decreased by 12% =
21. 21.240 decreased by 15% =
22. 22.150 decreased by 8% =
23. 23.742 increased by 50% =
24. 24.174 decreased by 50% =
25. 25.290 decreased by 10% =
26. 26.700 increased by 12% =
27. 27.140 increased by 40% =
28. 28.475 decreased by 40% =
29. 29.180 increased by 35% =
30. 30.400 increased by 35% =
31. 31.264 increased by 25% =
32. 32.435 increased by 20% =
33. 33.60 increased by 30% =
34. 34.96 decreased by 25% =
35. 35.320 increased by 35% =
36. 36.525 decreased by 40% =
37. 37.200 increased by 30% =
38. 38.90 decreased by 20% =
39. 39.610 increased by 30% =
40. 40.650 increased by 8% =

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