Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 36 · 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. 1.540 decreased by 35% =
2. 2.725 decreased by 8% =
3. 3.240 decreased by 20% =
4. 4.500 decreased by 8% =
5. 5.760 decreased by 10% =
6. 6.620 decreased by 15% =
7. 7.492 decreased by 75% =
8. 8.205 decreased by 60% =
9. 9.560 decreased by 35% =
10. 10.624 increased by 25% =
11. 11.380 decreased by 15% =
12. 12.215 decreased by 60% =
13. 13.600 increased by 35% =
14. 14.240 decreased by 15% =
15. 15.165 decreased by 60% =
16. 16.270 decreased by 30% =
17. 17.800 decreased by 35% =
18. 18.520 increased by 25% =
19. 19.440 increased by 35% =
20. 20.200 decreased by 40% =
21. 21.272 increased by 50% =
22. 22.410 decreased by 30% =
23. 23.220 decreased by 35% =
24. 24.420 decreased by 15% =
25. 25.772 decreased by 25% =
26. 26.290 increased by 10% =
27. 27.788 increased by 75% =
28. 28.560 decreased by 10% =
29. 29.350 decreased by 8% =
30. 30.680 increased by 15% =
31. 31.615 decreased by 20% =
32. 32.460 increased by 30% =
33. 33.475 increased by 12% =
34. 34.300 increased by 35% =
35. 35.785 increased by 40% =
36. 36.100 increased by 5% =
37. 37.84 decreased by 50% =
38. 38.340 increased by 15% =
39. 39.112 decreased by 25% =
40. 40.445 increased by 40% =

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