Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 936 · 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. 1.325 decreased by 20% =
2. 2.94 increased by 50% =
3. 3.235 increased by 60% =
4. 4.375 increased by 60% =
5. 5.540 decreased by 25% =
6. 6.50 decreased by 40% =
7. 7.90 decreased by 10% =
8. 8.720 decreased by 35% =
9. 9.490 increased by 40% =
10. 10.715 increased by 60% =
11. 11.800 increased by 35% =
12. 12.290 decreased by 20% =
13. 13.284 increased by 25% =
14. 14.50 decreased by 12% =
15. 15.480 increased by 5% =
16. 16.510 increased by 10% =
17. 17.660 decreased by 75% =
18. 18.340 decreased by 35% =
19. 19.444 increased by 25% =
20. 20.75 decreased by 8% =
21. 21.320 increased by 15% =
22. 22.324 increased by 50% =
23. 23.710 decreased by 10% =
24. 24.504 decreased by 50% =
25. 25.638 decreased by 50% =
26. 26.560 decreased by 10% =
27. 27.720 increased by 15% =
28. 28.220 increased by 5% =
29. 29.428 increased by 75% =
30. 30.740 increased by 30% =
31. 31.70 decreased by 50% =
32. 32.160 increased by 5% =
33. 33.740 increased by 35% =
34. 34.350 decreased by 12% =
35. 35.620 decreased by 5% =
36. 36.470 decreased by 10% =
37. 37.620 decreased by 35% =
38. 38.640 decreased by 5% =
39. 39.80 increased by 15% =
40. 40.740 decreased by 35% =

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