Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 725 · 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. 1.160 increased by 5% =
2. 2.50 decreased by 8% =
3. 3.495 increased by 20% =
4. 4.50 increased by 12% =
5. 5.434 decreased by 50% =
6. 6.640 increased by 5% =
7. 7.400 decreased by 5% =
8. 8.228 increased by 50% =
9. 9.475 decreased by 8% =
10. 10.572 increased by 25% =
11. 11.380 increased by 30% =
12. 12.550 decreased by 8% =
13. 13.652 decreased by 25% =
14. 14.555 increased by 40% =
15. 15.332 increased by 75% =
16. 16.90 increased by 10% =
17. 17.416 decreased by 75% =
18. 18.454 increased by 50% =
19. 19.140 increased by 35% =
20. 20.795 increased by 40% =
21. 21.248 increased by 25% =
22. 22.368 increased by 50% =
23. 23.560 decreased by 15% =
24. 24.594 decreased by 50% =
25. 25.580 decreased by 15% =
26. 26.300 decreased by 20% =
27. 27.240 increased by 10% =
28. 28.795 increased by 40% =
29. 29.635 decreased by 20% =
30. 30.500 increased by 12% =
31. 31.440 increased by 15% =
32. 32.684 increased by 75% =
33. 33.650 decreased by 10% =
34. 34.632 increased by 50% =
35. 35.190 decreased by 10% =
36. 36.50 increased by 8% =
37. 37.490 decreased by 30% =
38. 38.750 decreased by 12% =
39. 39.640 increased by 15% =
40. 40.704 increased by 75% =

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