Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 498 · 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. 1.176 increased by 75% =
2. 2.400 decreased by 12% =
3. 3.585 increased by 20% =
4. 4.540 increased by 35% =
5. 5.650 increased by 8% =
6. 6.760 increased by 20% =
7. 7.780 decreased by 15% =
8. 8.400 increased by 40% =
9. 9.320 increased by 35% =
10. 10.664 increased by 25% =
11. 11.744 decreased by 25% =
12. 12.780 decreased by 35% =
13. 13.500 increased by 15% =
14. 14.620 decreased by 15% =
15. 15.370 increased by 10% =
16. 16.150 decreased by 30% =
17. 17.535 increased by 60% =
18. 18.450 decreased by 60% =
19. 19.240 decreased by 35% =
20. 20.275 increased by 20% =
21. 21.340 increased by 35% =
22. 22.625 decreased by 12% =
23. 23.100 decreased by 12% =
24. 24.720 increased by 30% =
25. 25.360 decreased by 5% =
26. 26.495 increased by 60% =
27. 27.125 decreased by 8% =
28. 28.480 decreased by 10% =
29. 29.200 increased by 15% =
30. 30.220 increased by 10% =
31. 31.280 decreased by 15% =
32. 32.355 increased by 60% =
33. 33.200 decreased by 8% =
34. 34.445 decreased by 60% =
35. 35.260 increased by 15% =
36. 36.785 increased by 40% =
37. 37.50 increased by 8% =
38. 38.260 decreased by 5% =
39. 39.665 increased by 20% =
40. 40.560 increased by 15% =

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