Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 894 · 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. 1.625 increased by 8% =
2. 2.750 decreased by 12% =
3. 3.225 decreased by 8% =
4. 4.440 decreased by 15% =
5. 5.540 increased by 10% =
6. 6.275 decreased by 8% =
7. 7.400 increased by 12% =
8. 8.740 increased by 35% =
9. 9.100 decreased by 12% =
10. 10.494 decreased by 50% =
11. 11.150 increased by 60% =
12. 12.200 decreased by 5% =
13. 13.760 increased by 75% =
14. 14.200 decreased by 8% =
15. 15.650 increased by 60% =
16. 16.475 increased by 12% =
17. 17.640 increased by 5% =
18. 18.208 increased by 25% =
19. 19.740 decreased by 15% =
20. 20.720 decreased by 15% =
21. 21.370 increased by 30% =
22. 22.640 increased by 30% =
23. 23.692 increased by 25% =
24. 24.720 increased by 15% =
25. 25.460 increased by 75% =
26. 26.300 increased by 12% =
27. 27.210 decreased by 30% =
28. 28.400 decreased by 12% =
29. 29.800 decreased by 35% =
30. 30.500 increased by 5% =
31. 31.720 decreased by 5% =
32. 32.680 increased by 5% =
33. 33.200 increased by 15% =
34. 34.220 decreased by 5% =
35. 35.535 increased by 20% =
36. 36.150 increased by 30% =
37. 37.500 decreased by 60% =
38. 38.764 increased by 25% =
39. 39.675 increased by 12% =
40. 40.355 decreased by 20% =

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