Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 493 · 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. 1.740 increased by 35% =
2. 2.140 decreased by 35% =
3. 3.400 increased by 5% =
4. 4.785 increased by 20% =
5. 5.372 increased by 75% =
6. 6.765 increased by 40% =
7. 7.620 decreased by 75% =
8. 8.410 decreased by 20% =
9. 9.180 decreased by 5% =
10. 10.520 decreased by 5% =
11. 11.775 increased by 40% =
12. 12.775 increased by 8% =
13. 13.720 decreased by 15% =
14. 14.575 decreased by 20% =
15. 15.235 increased by 20% =
16. 16.230 increased by 20% =
17. 17.472 increased by 25% =
18. 18.400 decreased by 20% =
19. 19.560 increased by 15% =
20. 20.460 decreased by 30% =
21. 21.148 decreased by 75% =
22. 22.220 decreased by 5% =
23. 23.720 increased by 50% =
24. 24.655 decreased by 60% =
25. 25.200 decreased by 5% =
26. 26.175 increased by 40% =
27. 27.224 increased by 75% =
28. 28.670 increased by 10% =
29. 29.760 increased by 30% =
30. 30.800 increased by 5% =
31. 31.40 increased by 15% =
32. 32.650 increased by 60% =
33. 33.300 decreased by 15% =
34. 34.130 increased by 40% =
35. 35.725 increased by 12% =
36. 36.470 increased by 40% =
37. 37.70 decreased by 50% =
38. 38.175 decreased by 8% =
39. 39.70 decreased by 30% =
40. 40.576 decreased by 75% =

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