Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 288 · 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. 1.294 decreased by 50% =
2. 2.650 increased by 12% =
3. 3.150 decreased by 12% =
4. 4.280 decreased by 10% =
5. 5.765 increased by 60% =
6. 6.400 decreased by 8% =
7. 7.520 decreased by 35% =
8. 8.725 decreased by 12% =
9. 9.160 increased by 5% =
10. 10.425 increased by 60% =
11. 11.400 decreased by 8% =
12. 12.725 decreased by 12% =
13. 13.670 increased by 30% =
14. 14.626 increased by 50% =
15. 15.480 increased by 10% =
16. 16.140 decreased by 60% =
17. 17.105 increased by 40% =
18. 18.400 increased by 10% =
19. 19.790 increased by 30% =
20. 20.600 increased by 8% =
21. 21.280 increased by 35% =
22. 22.700 increased by 8% =
23. 23.75 decreased by 12% =
24. 24.174 decreased by 50% =
25. 25.625 increased by 40% =
26. 26.225 increased by 8% =
27. 27.292 increased by 25% =
28. 28.350 increased by 8% =
29. 29.64 increased by 50% =
30. 30.400 increased by 12% =
31. 31.592 increased by 25% =
32. 32.640 decreased by 25% =
33. 33.152 increased by 25% =
34. 34.375 increased by 8% =
35. 35.765 decreased by 60% =
36. 36.40 decreased by 15% =
37. 37.780 increased by 40% =
38. 38.380 increased by 20% =
39. 39.460 decreased by 10% =
40. 40.790 decreased by 40% =

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