Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 588 · 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. 1.450 increased by 12% =
2. 2.360 increased by 5% =
3. 3.248 increased by 75% =
4. 4.530 decreased by 10% =
5. 5.725 increased by 8% =
6. 6.740 decreased by 35% =
7. 7.608 increased by 75% =
8. 8.580 decreased by 20% =
9. 9.190 increased by 30% =
10. 10.500 decreased by 35% =
11. 11.125 decreased by 8% =
12. 12.156 decreased by 75% =
13. 13.140 increased by 25% =
14. 14.432 increased by 25% =
15. 15.800 increased by 5% =
16. 16.340 increased by 35% =
17. 17.725 decreased by 8% =
18. 18.140 decreased by 5% =
19. 19.312 increased by 25% =
20. 20.320 decreased by 10% =
21. 21.325 increased by 12% =
22. 22.300 decreased by 35% =
23. 23.200 increased by 20% =
24. 24.384 decreased by 25% =
25. 25.260 decreased by 15% =
26. 26.610 increased by 40% =
27. 27.568 decreased by 25% =
28. 28.40 decreased by 35% =
29. 29.325 decreased by 8% =
30. 30.472 increased by 50% =
31. 31.540 decreased by 5% =
32. 32.800 decreased by 8% =
33. 33.720 decreased by 15% =
34. 34.110 decreased by 10% =
35. 35.392 increased by 25% =
36. 36.415 increased by 20% =
37. 37.600 decreased by 15% =
38. 38.145 decreased by 20% =
39. 39.380 decreased by 40% =
40. 40.556 decreased by 75% =

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