Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 450 · 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. 1.600 increased by 50% =
2. 2.575 decreased by 8% =
3. 3.585 increased by 40% =
4. 4.375 increased by 60% =
5. 5.760 decreased by 35% =
6. 6.300 decreased by 15% =
7. 7.580 increased by 35% =
8. 8.100 decreased by 8% =
9. 9.164 decreased by 75% =
10. 10.760 decreased by 20% =
11. 11.340 decreased by 15% =
12. 12.190 decreased by 60% =
13. 13.125 increased by 8% =
14. 14.220 decreased by 10% =
15. 15.760 increased by 60% =
16. 16.760 increased by 10% =
17. 17.425 decreased by 8% =
18. 18.170 increased by 10% =
19. 19.675 decreased by 12% =
20. 20.520 decreased by 10% =
21. 21.300 decreased by 8% =
22. 22.532 increased by 25% =
23. 23.48 increased by 75% =
24. 24.380 decreased by 30% =
25. 25.800 decreased by 35% =
26. 26.154 decreased by 50% =
27. 27.745 increased by 20% =
28. 28.670 increased by 40% =
29. 29.770 decreased by 30% =
30. 30.375 decreased by 40% =
31. 31.100 decreased by 10% =
32. 32.572 decreased by 25% =
33. 33.720 decreased by 20% =
34. 34.475 increased by 12% =
35. 35.236 decreased by 75% =
36. 36.650 increased by 12% =
37. 37.708 increased by 50% =
38. 38.300 decreased by 35% =
39. 39.240 increased by 20% =
40. 40.320 decreased by 40% =

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