Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 296 · 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 40% =
2. 2.428 decreased by 50% =
3. 3.350 decreased by 8% =
4. 4.500 increased by 30% =
5. 5.645 decreased by 20% =
6. 6.570 increased by 10% =
7. 7.40 decreased by 35% =
8. 8.600 increased by 30% =
9. 9.100 decreased by 12% =
10. 10.795 increased by 60% =
11. 11.475 increased by 8% =
12. 12.448 increased by 75% =
13. 13.784 decreased by 25% =
14. 14.600 increased by 8% =
15. 15.645 decreased by 60% =
16. 16.376 increased by 25% =
17. 17.380 decreased by 50% =
18. 18.508 increased by 25% =
19. 19.525 decreased by 20% =
20. 20.660 decreased by 15% =
21. 21.540 increased by 5% =
22. 22.500 increased by 10% =
23. 23.160 increased by 35% =
24. 24.780 increased by 15% =
25. 25.180 decreased by 30% =
26. 26.640 decreased by 35% =
27. 27.195 increased by 20% =
28. 28.760 decreased by 10% =
29. 29.120 increased by 10% =
30. 30.560 decreased by 60% =
31. 31.240 decreased by 15% =
32. 32.608 increased by 25% =
33. 33.70 decreased by 30% =
34. 34.605 decreased by 40% =
35. 35.280 decreased by 15% =
36. 36.165 increased by 20% =
37. 37.612 increased by 75% =
38. 38.365 decreased by 60% =
39. 39.390 decreased by 60% =
40. 40.180 increased by 60% =

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