Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 812 · 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. 1.466 decreased by 50% =
2. 2.88 decreased by 25% =
3. 3.705 increased by 60% =
4. 4.425 increased by 12% =
5. 5.40 decreased by 5% =
6. 6.480 increased by 5% =
7. 7.400 decreased by 12% =
8. 8.604 decreased by 50% =
9. 9.555 increased by 20% =
10. 10.775 increased by 8% =
11. 11.700 increased by 15% =
12. 12.580 decreased by 35% =
13. 13.60 decreased by 35% =
14. 14.600 decreased by 15% =
15. 15.750 decreased by 12% =
16. 16.268 decreased by 25% =
17. 17.530 increased by 20% =
18. 18.476 increased by 50% =
19. 19.112 decreased by 75% =
20. 20.760 decreased by 35% =
21. 21.275 increased by 20% =
22. 22.525 increased by 8% =
23. 23.196 decreased by 50% =
24. 24.540 increased by 40% =
25. 25.660 increased by 5% =
26. 26.100 increased by 35% =
27. 27.240 decreased by 15% =
28. 28.272 decreased by 50% =
29. 29.385 decreased by 60% =
30. 30.104 increased by 50% =
31. 31.375 increased by 20% =
32. 32.660 increased by 20% =
33. 33.200 increased by 35% =
34. 34.355 increased by 20% =
35. 35.725 decreased by 8% =
36. 36.430 decreased by 20% =
37. 37.75 decreased by 12% =
38. 38.175 decreased by 40% =
39. 39.344 decreased by 75% =
40. 40.710 decreased by 10% =

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