Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 13 · 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. 1.740 decreased by 60% =
2. 2.200 increased by 8% =
3. 3.160 increased by 20% =
4. 4.144 decreased by 25% =
5. 5.85 increased by 60% =
6. 6.432 decreased by 25% =
7. 7.136 increased by 25% =
8. 8.320 increased by 10% =
9. 9.160 increased by 5% =
10. 10.200 increased by 8% =
11. 11.80 decreased by 5% =
12. 12.50 increased by 8% =
13. 13.756 decreased by 50% =
14. 14.328 decreased by 50% =
15. 15.288 decreased by 50% =
16. 16.528 increased by 75% =
17. 17.482 decreased by 50% =
18. 18.480 decreased by 15% =
19. 19.760 decreased by 30% =
20. 20.260 decreased by 35% =
21. 21.145 increased by 20% =
22. 22.410 increased by 30% =
23. 23.100 decreased by 12% =
24. 24.750 decreased by 10% =
25. 25.460 decreased by 40% =
26. 26.612 decreased by 75% =
27. 27.360 increased by 20% =
28. 28.180 increased by 10% =
29. 29.775 increased by 12% =
30. 30.800 increased by 15% =
31. 31.450 increased by 40% =
32. 32.80 decreased by 30% =
33. 33.600 increased by 10% =
34. 34.56 increased by 25% =
35. 35.518 increased by 50% =
36. 36.510 increased by 10% =
37. 37.125 increased by 8% =
38. 38.260 decreased by 35% =
39. 39.300 increased by 15% =
40. 40.425 increased by 12% =

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