Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 444 · 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. 1.200 increased by 8% =
2. 2.785 decreased by 40% =
3. 3.608 increased by 75% =
4. 4.324 increased by 25% =
5. 5.660 decreased by 35% =
6. 6.725 increased by 20% =
7. 7.725 decreased by 8% =
8. 8.780 increased by 35% =
9. 9.760 increased by 15% =
10. 10.760 increased by 5% =
11. 11.648 increased by 50% =
12. 12.510 increased by 10% =
13. 13.540 decreased by 5% =
14. 14.220 increased by 15% =
15. 15.500 increased by 35% =
16. 16.475 decreased by 20% =
17. 17.410 increased by 20% =
18. 18.625 decreased by 8% =
19. 19.265 increased by 20% =
20. 20.220 increased by 5% =
21. 21.500 decreased by 30% =
22. 22.540 increased by 15% =
23. 23.690 increased by 20% =
24. 24.620 decreased by 35% =
25. 25.400 increased by 5% =
26. 26.70 increased by 10% =
27. 27.705 decreased by 20% =
28. 28.96 increased by 25% =
29. 29.120 decreased by 15% =
30. 30.125 decreased by 8% =
31. 31.220 increased by 15% =
32. 32.650 increased by 50% =
33. 33.780 increased by 5% =
34. 34.440 decreased by 30% =
35. 35.568 decreased by 75% =
36. 36.150 increased by 60% =
37. 37.636 increased by 25% =
38. 38.608 increased by 25% =
39. 39.676 decreased by 50% =
40. 40.775 decreased by 8% =

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