Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 396 · 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. 1.160 decreased by 5% =
2. 2.420 increased by 50% =
3. 3.218 increased by 50% =
4. 4.640 increased by 10% =
5. 5.328 increased by 75% =
6. 6.740 increased by 5% =
7. 7.244 decreased by 75% =
8. 8.160 increased by 25% =
9. 9.590 increased by 60% =
10. 10.475 increased by 12% =
11. 11.420 increased by 30% =
12. 12.310 increased by 10% =
13. 13.505 increased by 20% =
14. 14.220 decreased by 15% =
15. 15.120 increased by 30% =
16. 16.520 increased by 15% =
17. 17.135 decreased by 20% =
18. 18.688 decreased by 25% =
19. 19.675 decreased by 12% =
20. 20.190 decreased by 30% =
21. 21.425 increased by 12% =
22. 22.732 increased by 50% =
23. 23.350 increased by 12% =
24. 24.325 increased by 12% =
25. 25.100 increased by 10% =
26. 26.650 decreased by 8% =
27. 27.292 increased by 50% =
28. 28.800 decreased by 8% =
29. 29.650 increased by 30% =
30. 30.760 increased by 5% =
31. 31.500 increased by 15% =
32. 32.525 decreased by 12% =
33. 33.500 increased by 15% =
34. 34.175 increased by 12% =
35. 35.620 decreased by 15% =
36. 36.80 decreased by 30% =
37. 37.180 increased by 40% =
38. 38.90 decreased by 60% =
39. 39.590 increased by 30% =
40. 40.260 increased by 5% =

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