Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 48 · 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. 1.728 decreased by 75% =
2. 2.588 decreased by 75% =
3. 3.600 increased by 15% =
4. 4.400 increased by 35% =
5. 5.44 increased by 25% =
6. 6.380 increased by 35% =
7. 7.150 increased by 60% =
8. 8.330 increased by 30% =
9. 9.652 increased by 25% =
10. 10.232 decreased by 75% =
11. 11.708 increased by 50% =
12. 12.575 increased by 8% =
13. 13.700 decreased by 35% =
14. 14.725 increased by 12% =
15. 15.762 decreased by 50% =
16. 16.575 increased by 8% =
17. 17.540 increased by 5% =
18. 18.290 decreased by 10% =
19. 19.190 increased by 20% =
20. 20.760 decreased by 15% =
21. 21.580 increased by 30% =
22. 22.124 increased by 75% =
23. 23.582 decreased by 50% =
24. 24.380 decreased by 35% =
25. 25.260 increased by 30% =
26. 26.75 decreased by 12% =
27. 27.775 increased by 8% =
28. 28.545 decreased by 60% =
29. 29.168 decreased by 25% =
30. 30.350 decreased by 30% =
31. 31.620 decreased by 75% =
32. 32.775 increased by 12% =
33. 33.660 increased by 5% =
34. 34.744 increased by 50% =
35. 35.260 decreased by 5% =
36. 36.200 decreased by 15% =
37. 37.650 increased by 10% =
38. 38.240 increased by 10% =
39. 39.290 decreased by 10% =
40. 40.275 increased by 40% =

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