Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 441 · 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. 1.260 decreased by 5% =
2. 2.550 increased by 12% =
3. 3.110 increased by 60% =
4. 4.140 decreased by 15% =
5. 5.644 increased by 25% =
6. 6.290 decreased by 10% =
7. 7.610 increased by 30% =
8. 8.780 decreased by 35% =
9. 9.84 increased by 75% =
10. 10.110 increased by 60% =
11. 11.620 decreased by 15% =
12. 12.625 decreased by 60% =
13. 13.765 increased by 20% =
14. 14.528 decreased by 75% =
15. 15.525 decreased by 8% =
16. 16.750 decreased by 8% =
17. 17.770 increased by 20% =
18. 18.435 decreased by 40% =
19. 19.740 increased by 10% =
20. 20.465 increased by 60% =
21. 21.720 decreased by 40% =
22. 22.565 increased by 20% =
23. 23.160 increased by 10% =
24. 24.416 decreased by 25% =
25. 25.640 increased by 10% =
26. 26.330 increased by 20% =
27. 27.350 decreased by 12% =
28. 28.60 increased by 40% =
29. 29.370 increased by 30% =
30. 30.230 decreased by 10% =
31. 31.120 increased by 5% =
32. 32.85 increased by 60% =
33. 33.640 increased by 40% =
34. 34.450 decreased by 10% =
35. 35.394 decreased by 50% =
36. 36.340 increased by 15% =
37. 37.120 decreased by 15% =
38. 38.234 increased by 50% =
39. 39.800 increased by 8% =
40. 40.440 decreased by 15% =

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