Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 367 · 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. 1.360 increased by 75% =
2. 2.780 increased by 5% =
3. 3.125 decreased by 8% =
4. 4.680 increased by 5% =
5. 5.600 increased by 10% =
6. 6.445 increased by 20% =
7. 7.640 increased by 20% =
8. 8.185 increased by 40% =
9. 9.520 decreased by 35% =
10. 10.160 decreased by 10% =
11. 11.475 increased by 12% =
12. 12.220 increased by 35% =
13. 13.220 decreased by 30% =
14. 14.730 increased by 10% =
15. 15.430 increased by 30% =
16. 16.765 decreased by 20% =
17. 17.420 increased by 75% =
18. 18.542 increased by 50% =
19. 19.400 increased by 75% =
20. 20.640 decreased by 5% =
21. 21.120 increased by 15% =
22. 22.775 increased by 12% =
23. 23.488 decreased by 75% =
24. 24.475 increased by 20% =
25. 25.196 decreased by 50% =
26. 26.175 decreased by 12% =
27. 27.800 increased by 40% =
28. 28.432 decreased by 50% =
29. 29.610 increased by 60% =
30. 30.190 increased by 20% =
31. 31.320 decreased by 30% =
32. 32.120 increased by 5% =
33. 33.310 increased by 10% =
34. 34.525 increased by 60% =
35. 35.420 decreased by 15% =
36. 36.125 decreased by 8% =
37. 37.490 increased by 10% =
38. 38.180 increased by 30% =
39. 39.180 increased by 20% =
40. 40.88 decreased by 50% =

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