Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 687 · 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. 1.320 increased by 5% =
2. 2.680 decreased by 30% =
3. 3.454 decreased by 50% =
4. 4.790 increased by 20% =
5. 5.260 decreased by 5% =
6. 6.270 increased by 30% =
7. 7.260 decreased by 15% =
8. 8.160 decreased by 10% =
9. 9.788 increased by 25% =
10. 10.80 decreased by 35% =
11. 11.680 increased by 40% =
12. 12.145 increased by 40% =
13. 13.345 decreased by 20% =
14. 14.325 decreased by 12% =
15. 15.80 decreased by 5% =
16. 16.700 decreased by 30% =
17. 17.800 decreased by 15% =
18. 18.584 decreased by 25% =
19. 19.125 decreased by 12% =
20. 20.710 increased by 30% =
21. 21.340 increased by 15% =
22. 22.520 decreased by 40% =
23. 23.150 decreased by 10% =
24. 24.178 decreased by 50% =
25. 25.180 increased by 35% =
26. 26.744 decreased by 25% =
27. 27.336 increased by 75% =
28. 28.350 increased by 8% =
29. 29.500 increased by 10% =
30. 30.490 increased by 30% =
31. 31.225 increased by 12% =
32. 32.550 decreased by 30% =
33. 33.170 decreased by 30% =
34. 34.250 increased by 50% =
35. 35.520 increased by 30% =
36. 36.230 decreased by 50% =
37. 37.592 increased by 75% =
38. 38.80 decreased by 75% =
39. 39.595 decreased by 40% =
40. 40.180 increased by 10% =

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