Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 365 · 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. 1.125 decreased by 8% =
2. 2.680 increased by 60% =
3. 3.140 increased by 75% =
4. 4.214 decreased by 50% =
5. 5.780 decreased by 50% =
6. 6.624 decreased by 75% =
7. 7.190 decreased by 30% =
8. 8.50 decreased by 30% =
9. 9.620 increased by 35% =
10. 10.125 increased by 8% =
11. 11.84 increased by 25% =
12. 12.50 decreased by 10% =
13. 13.230 increased by 40% =
14. 14.780 decreased by 15% =
15. 15.400 increased by 5% =
16. 16.620 decreased by 15% =
17. 17.80 decreased by 15% =
18. 18.630 decreased by 50% =
19. 19.300 increased by 5% =
20. 20.80 decreased by 30% =
21. 21.656 decreased by 50% =
22. 22.275 increased by 8% =
23. 23.220 decreased by 15% =
24. 24.764 increased by 25% =
25. 25.70 increased by 20% =
26. 26.525 increased by 12% =
27. 27.56 decreased by 50% =
28. 28.130 increased by 20% =
29. 29.400 increased by 35% =
30. 30.275 increased by 12% =
31. 31.285 decreased by 60% =
32. 32.260 increased by 35% =
33. 33.760 increased by 15% =
34. 34.625 decreased by 8% =
35. 35.484 decreased by 25% =
36. 36.220 decreased by 5% =
37. 37.540 increased by 15% =
38. 38.350 decreased by 20% =
39. 39.715 decreased by 20% =
40. 40.720 increased by 5% =

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