Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 846 · 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. 1.520 decreased by 35% =
2. 2.740 decreased by 35% =
3. 3.740 decreased by 10% =
4. 4.594 decreased by 50% =
5. 5.640 decreased by 30% =
6. 6.640 decreased by 35% =
7. 7.240 increased by 35% =
8. 8.485 decreased by 20% =
9. 9.190 decreased by 60% =
10. 10.40 decreased by 35% =
11. 11.540 decreased by 50% =
12. 12.750 decreased by 12% =
13. 13.275 decreased by 60% =
14. 14.425 decreased by 8% =
15. 15.200 increased by 30% =
16. 16.460 decreased by 35% =
17. 17.48 increased by 25% =
18. 18.396 decreased by 25% =
19. 19.325 increased by 12% =
20. 20.100 decreased by 8% =
21. 21.40 decreased by 75% =
22. 22.110 decreased by 10% =
23. 23.336 decreased by 25% =
24. 24.640 increased by 5% =
25. 25.40 increased by 60% =
26. 26.612 decreased by 75% =
27. 27.625 decreased by 8% =
28. 28.175 decreased by 20% =
29. 29.74 decreased by 50% =
30. 30.552 increased by 75% =
31. 31.240 decreased by 15% =
32. 32.138 decreased by 50% =
33. 33.725 increased by 12% =
34. 34.670 decreased by 10% =
35. 35.320 increased by 15% =
36. 36.756 decreased by 50% =
37. 37.100 increased by 20% =
38. 38.620 decreased by 60% =
39. 39.675 increased by 12% =
40. 40.466 increased by 50% =

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