Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 191 · 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. 1.320 decreased by 5% =
2. 2.40 increased by 50% =
3. 3.476 increased by 50% =
4. 4.580 decreased by 35% =
5. 5.575 increased by 12% =
6. 6.740 increased by 5% =
7. 7.250 decreased by 60% =
8. 8.40 decreased by 5% =
9. 9.350 decreased by 8% =
10. 10.500 decreased by 12% =
11. 11.720 decreased by 15% =
12. 12.560 increased by 5% =
13. 13.45 decreased by 60% =
14. 14.300 increased by 35% =
15. 15.305 decreased by 20% =
16. 16.80 increased by 15% =
17. 17.640 decreased by 15% =
18. 18.295 increased by 60% =
19. 19.760 decreased by 35% =
20. 20.325 increased by 12% =
21. 21.125 increased by 8% =
22. 22.464 decreased by 75% =
23. 23.650 increased by 12% =
24. 24.256 increased by 25% =
25. 25.760 decreased by 15% =
26. 26.572 increased by 25% =
27. 27.500 decreased by 12% =
28. 28.650 decreased by 60% =
29. 29.310 increased by 30% =
30. 30.356 decreased by 25% =
31. 31.590 decreased by 10% =
32. 32.680 increased by 25% =
33. 33.340 decreased by 60% =
34. 34.710 increased by 10% =
35. 35.625 increased by 12% =
36. 36.420 decreased by 30% =
37. 37.84 decreased by 25% =
38. 38.520 increased by 10% =
39. 39.475 increased by 60% =
40. 40.150 decreased by 8% =

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