Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 475 · 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. 1.450 decreased by 40% =
2. 2.225 increased by 8% =
3. 3.775 increased by 8% =
4. 4.548 decreased by 75% =
5. 5.588 increased by 50% =
6. 6.220 decreased by 20% =
7. 7.200 decreased by 15% =
8. 8.344 increased by 25% =
9. 9.96 decreased by 25% =
10. 10.320 increased by 15% =
11. 11.125 increased by 8% =
12. 12.300 increased by 12% =
13. 13.416 increased by 50% =
14. 14.600 decreased by 8% =
15. 15.420 increased by 15% =
16. 16.128 increased by 75% =
17. 17.685 decreased by 20% =
18. 18.500 decreased by 8% =
19. 19.520 increased by 10% =
20. 20.152 increased by 25% =
21. 21.780 increased by 25% =
22. 22.690 increased by 10% =
23. 23.260 decreased by 5% =
24. 24.420 increased by 30% =
25. 25.416 increased by 25% =
26. 26.760 increased by 15% =
27. 27.220 increased by 15% =
28. 28.320 increased by 5% =
29. 29.50 increased by 12% =
30. 30.760 decreased by 15% =
31. 31.595 decreased by 40% =
32. 32.44 increased by 25% =
33. 33.732 increased by 75% =
34. 34.620 increased by 25% =
35. 35.400 increased by 15% =
36. 36.150 decreased by 12% =
37. 37.40 increased by 10% =
38. 38.264 decreased by 50% =
39. 39.770 increased by 30% =
40. 40.410 increased by 60% =

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