Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 964 · 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. 1.250 decreased by 12% =
2. 2.588 increased by 25% =
3. 3.740 increased by 10% =
4. 4.440 decreased by 35% =
5. 5.740 decreased by 25% =
6. 6.680 increased by 35% =
7. 7.195 increased by 60% =
8. 8.575 decreased by 12% =
9. 9.100 increased by 30% =
10. 10.690 decreased by 30% =
11. 11.704 increased by 50% =
12. 12.376 increased by 75% =
13. 13.600 increased by 12% =
14. 14.440 decreased by 5% =
15. 15.525 increased by 40% =
16. 16.480 decreased by 35% =
17. 17.395 decreased by 60% =
18. 18.300 decreased by 5% =
19. 19.686 increased by 50% =
20. 20.760 increased by 15% =
21. 21.520 decreased by 35% =
22. 22.180 increased by 5% =
23. 23.200 increased by 15% =
24. 24.216 increased by 75% =
25. 25.370 decreased by 30% =
26. 26.488 decreased by 50% =
27. 27.350 increased by 12% =
28. 28.480 decreased by 10% =
29. 29.760 decreased by 50% =
30. 30.744 decreased by 50% =
31. 31.135 decreased by 20% =
32. 32.675 increased by 12% =
33. 33.340 decreased by 35% =
34. 34.320 decreased by 35% =
35. 35.780 decreased by 15% =
36. 36.220 decreased by 10% =
37. 37.485 decreased by 40% =
38. 38.750 increased by 30% =
39. 39.625 decreased by 8% =
40. 40.250 increased by 12% =

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