Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 426 · 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. 1.500 decreased by 10% =
2. 2.220 increased by 60% =
3. 3.420 increased by 75% =
4. 4.780 decreased by 50% =
5. 5.790 decreased by 10% =
6. 6.280 decreased by 10% =
7. 7.700 increased by 8% =
8. 8.560 decreased by 15% =
9. 9.525 increased by 8% =
10. 10.240 increased by 35% =
11. 11.200 decreased by 5% =
12. 12.500 increased by 60% =
13. 13.110 decreased by 60% =
14. 14.80 decreased by 35% =
15. 15.480 increased by 35% =
16. 16.495 increased by 40% =
17. 17.390 decreased by 10% =
18. 18.480 increased by 5% =
19. 19.700 increased by 25% =
20. 20.300 increased by 5% =
21. 21.425 decreased by 12% =
22. 22.280 decreased by 30% =
23. 23.325 decreased by 12% =
24. 24.456 increased by 50% =
25. 25.800 increased by 12% =
26. 26.160 increased by 30% =
27. 27.180 increased by 5% =
28. 28.475 decreased by 8% =
29. 29.210 increased by 60% =
30. 30.70 increased by 40% =
31. 31.40 increased by 25% =
32. 32.500 increased by 8% =
33. 33.220 increased by 5% =
34. 34.725 decreased by 12% =
35. 35.660 increased by 25% =
36. 36.585 decreased by 20% =
37. 37.200 decreased by 35% =
38. 38.700 decreased by 5% =
39. 39.720 decreased by 75% =
40. 40.688 decreased by 25% =

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