Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 216 · 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. 1.575 increased by 12% =
2. 2.120 increased by 5% =
3. 3.225 decreased by 12% =
4. 4.740 decreased by 35% =
5. 5.185 decreased by 20% =
6. 6.764 increased by 50% =
7. 7.760 decreased by 20% =
8. 8.500 decreased by 8% =
9. 9.385 increased by 20% =
10. 10.248 decreased by 25% =
11. 11.410 decreased by 30% =
12. 12.425 increased by 8% =
13. 13.590 increased by 30% =
14. 14.775 increased by 40% =
15. 15.240 increased by 35% =
16. 16.765 decreased by 20% =
17. 17.150 decreased by 50% =
18. 18.440 increased by 15% =
19. 19.396 increased by 25% =
20. 20.86 increased by 50% =
21. 21.600 increased by 15% =
22. 22.520 decreased by 25% =
23. 23.395 increased by 60% =
24. 24.150 decreased by 10% =
25. 25.590 decreased by 20% =
26. 26.695 increased by 20% =
27. 27.750 decreased by 12% =
28. 28.720 increased by 35% =
29. 29.100 increased by 35% =
30. 30.350 increased by 8% =
31. 31.280 increased by 15% =
32. 32.425 decreased by 8% =
33. 33.400 increased by 50% =
34. 34.540 increased by 10% =
35. 35.275 increased by 8% =
36. 36.220 decreased by 20% =
37. 37.244 decreased by 75% =
38. 38.706 increased by 50% =
39. 39.220 increased by 15% =
40. 40.520 increased by 15% =

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