Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 17 · 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. 1.388 increased by 25% =
2. 2.432 increased by 25% =
3. 3.225 decreased by 8% =
4. 4.155 decreased by 60% =
5. 5.360 decreased by 10% =
6. 6.700 decreased by 10% =
7. 7.360 increased by 75% =
8. 8.40 decreased by 15% =
9. 9.160 increased by 10% =
10. 10.760 increased by 35% =
11. 11.125 increased by 12% =
12. 12.540 increased by 75% =
13. 13.600 increased by 15% =
14. 14.205 increased by 60% =
15. 15.480 increased by 5% =
16. 16.60 decreased by 5% =
17. 17.140 decreased by 35% =
18. 18.560 increased by 35% =
19. 19.100 increased by 5% =
20. 20.80 decreased by 20% =
21. 21.70 increased by 10% =
22. 22.100 decreased by 75% =
23. 23.264 increased by 75% =
24. 24.675 increased by 8% =
25. 25.644 decreased by 25% =
26. 26.620 increased by 60% =
27. 27.700 decreased by 12% =
28. 28.672 increased by 25% =
29. 29.580 increased by 15% =
30. 30.760 increased by 15% =
31. 31.75 increased by 12% =
32. 32.405 increased by 20% =
33. 33.672 increased by 25% =
34. 34.284 increased by 25% =
35. 35.496 increased by 25% =
36. 36.75 decreased by 12% =
37. 37.625 increased by 20% =
38. 38.725 decreased by 8% =
39. 39.480 decreased by 10% =
40. 40.660 decreased by 35% =

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