Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 909 · 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. 2.140 increased by 60% =
3. 3.130 increased by 10% =
4. 4.128 increased by 25% =
5. 5.160 increased by 10% =
6. 6.760 increased by 30% =
7. 7.450 decreased by 30% =
8. 8.240 decreased by 10% =
9. 9.60 increased by 15% =
10. 10.564 increased by 75% =
11. 11.264 increased by 25% =
12. 12.525 decreased by 12% =
13. 13.600 increased by 15% =
14. 14.320 decreased by 75% =
15. 15.110 decreased by 10% =
16. 16.180 decreased by 35% =
17. 17.300 increased by 12% =
18. 18.720 increased by 30% =
19. 19.410 increased by 20% =
20. 20.80 increased by 30% =
21. 21.750 increased by 10% =
22. 22.745 decreased by 60% =
23. 23.760 increased by 5% =
24. 24.105 decreased by 20% =
25. 25.460 increased by 50% =
26. 26.540 decreased by 10% =
27. 27.300 decreased by 8% =
28. 28.785 increased by 20% =
29. 29.220 increased by 15% =
30. 30.90 decreased by 10% =
31. 31.292 decreased by 25% =
32. 32.800 increased by 15% =
33. 33.720 decreased by 35% =
34. 34.144 decreased by 75% =
35. 35.680 decreased by 40% =
36. 36.550 decreased by 30% =
37. 37.45 increased by 20% =
38. 38.140 decreased by 40% =
39. 39.410 decreased by 60% =
40. 40.190 increased by 60% =

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