Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 435 · 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. 1.188 decreased by 25% =
2. 2.440 decreased by 75% =
3. 3.270 decreased by 50% =
4. 4.760 decreased by 10% =
5. 5.356 decreased by 25% =
6. 6.344 decreased by 75% =
7. 7.630 decreased by 10% =
8. 8.200 decreased by 60% =
9. 9.150 decreased by 12% =
10. 10.394 increased by 50% =
11. 11.415 increased by 40% =
12. 12.700 decreased by 60% =
13. 13.225 decreased by 60% =
14. 14.200 decreased by 12% =
15. 15.425 decreased by 12% =
16. 16.416 increased by 25% =
17. 17.660 decreased by 30% =
18. 18.296 increased by 75% =
19. 19.580 increased by 5% =
20. 20.110 increased by 10% =
21. 21.460 increased by 15% =
22. 22.40 increased by 5% =
23. 23.280 increased by 20% =
24. 24.390 decreased by 30% =
25. 25.370 increased by 30% =
26. 26.340 decreased by 10% =
27. 27.260 increased by 35% =
28. 28.535 decreased by 40% =
29. 29.480 increased by 35% =
30. 30.380 increased by 30% =
31. 31.555 decreased by 20% =
32. 32.615 decreased by 40% =
33. 33.152 increased by 50% =
34. 34.225 increased by 12% =
35. 35.320 decreased by 15% =
36. 36.475 increased by 12% =
37. 37.665 increased by 40% =
38. 38.300 decreased by 12% =
39. 39.284 decreased by 25% =
40. 40.280 increased by 35% =

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