Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 238 · 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. 1.580 increased by 60% =
2. 2.200 increased by 5% =
3. 3.425 decreased by 60% =
4. 4.740 decreased by 75% =
5. 5.650 decreased by 8% =
6. 6.600 increased by 20% =
7. 7.156 decreased by 75% =
8. 8.184 increased by 25% =
9. 9.640 increased by 35% =
10. 10.765 decreased by 20% =
11. 11.520 increased by 75% =
12. 12.670 decreased by 10% =
13. 13.656 decreased by 75% =
14. 14.270 increased by 10% =
15. 15.696 decreased by 25% =
16. 16.500 increased by 15% =
17. 17.112 decreased by 25% =
18. 18.130 increased by 30% =
19. 19.540 decreased by 20% =
20. 20.400 increased by 30% =
21. 21.80 increased by 5% =
22. 22.672 increased by 75% =
23. 23.325 decreased by 8% =
24. 24.500 increased by 8% =
25. 25.370 increased by 20% =
26. 26.148 decreased by 75% =
27. 27.600 decreased by 15% =
28. 28.125 increased by 20% =
29. 29.525 increased by 60% =
30. 30.70 increased by 60% =
31. 31.72 increased by 75% =
32. 32.150 increased by 10% =
33. 33.256 increased by 75% =
34. 34.100 increased by 8% =
35. 35.148 increased by 25% =
36. 36.400 increased by 5% =
37. 37.388 increased by 75% =
38. 38.452 decreased by 25% =
39. 39.75 decreased by 12% =
40. 40.180 decreased by 5% =

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