Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 323 · 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. 1.490 increased by 20% =
2. 2.612 decreased by 75% =
3. 3.200 decreased by 5% =
4. 4.40 increased by 50% =
5. 5.264 decreased by 25% =
6. 6.350 decreased by 50% =
7. 7.630 decreased by 20% =
8. 8.340 decreased by 5% =
9. 9.230 decreased by 60% =
10. 10.440 increased by 50% =
11. 11.400 increased by 5% =
12. 12.760 decreased by 75% =
13. 13.125 increased by 40% =
14. 14.175 decreased by 8% =
15. 15.740 increased by 30% =
16. 16.75 increased by 12% =
17. 17.95 decreased by 60% =
18. 18.60 increased by 5% =
19. 19.592 increased by 75% =
20. 20.180 increased by 10% =
21. 21.400 decreased by 5% =
22. 22.604 increased by 50% =
23. 23.675 increased by 8% =
24. 24.575 decreased by 8% =
25. 25.375 increased by 20% =
26. 26.692 decreased by 75% =
27. 27.460 decreased by 5% =
28. 28.196 decreased by 25% =
29. 29.105 decreased by 20% =
30. 30.640 decreased by 40% =
31. 31.580 decreased by 35% =
32. 32.660 increased by 10% =
33. 33.100 increased by 35% =
34. 34.215 decreased by 40% =
35. 35.550 increased by 30% =
36. 36.120 decreased by 75% =
37. 37.380 decreased by 15% =
38. 38.325 decreased by 12% =
39. 39.190 increased by 10% =
40. 40.300 increased by 75% =

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