Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 758 · 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. 1.175 decreased by 8% =
2. 2.112 increased by 75% =
3. 3.500 decreased by 8% =
4. 4.792 increased by 25% =
5. 5.100 decreased by 12% =
6. 6.640 increased by 35% =
7. 7.288 decreased by 75% =
8. 8.350 decreased by 12% =
9. 9.295 increased by 40% =
10. 10.700 increased by 5% =
11. 11.415 increased by 20% =
12. 12.660 decreased by 40% =
13. 13.70 decreased by 20% =
14. 14.265 decreased by 60% =
15. 15.164 increased by 50% =
16. 16.220 increased by 35% =
17. 17.200 increased by 35% =
18. 18.675 decreased by 12% =
19. 19.615 decreased by 60% =
20. 20.380 decreased by 5% =
21. 21.420 decreased by 35% =
22. 22.250 increased by 8% =
23. 23.400 increased by 30% =
24. 24.100 decreased by 5% =
25. 25.476 increased by 75% =
26. 26.182 increased by 50% =
27. 27.270 increased by 30% =
28. 28.140 increased by 5% =
29. 29.725 decreased by 40% =
30. 30.110 decreased by 10% =
31. 31.430 decreased by 20% =
32. 32.280 increased by 5% =
33. 33.320 increased by 10% =
34. 34.568 decreased by 25% =
35. 35.145 increased by 20% =
36. 36.700 decreased by 10% =
37. 37.475 increased by 8% =
38. 38.190 decreased by 50% =
39. 39.128 decreased by 25% =
40. 40.360 increased by 35% =

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