Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 150 · 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. 1.485 increased by 40% =
2. 2.500 increased by 30% =
3. 3.256 increased by 75% =
4. 4.775 increased by 20% =
5. 5.130 increased by 60% =
6. 6.590 decreased by 30% =
7. 7.200 decreased by 75% =
8. 8.740 increased by 15% =
9. 9.680 increased by 35% =
10. 10.675 increased by 8% =
11. 11.520 increased by 30% =
12. 12.280 decreased by 15% =
13. 13.50 decreased by 30% =
14. 14.715 decreased by 20% =
15. 15.320 decreased by 10% =
16. 16.192 increased by 25% =
17. 17.250 decreased by 8% =
18. 18.300 increased by 8% =
19. 19.275 decreased by 20% =
20. 20.624 decreased by 50% =
21. 21.200 increased by 5% =
22. 22.232 decreased by 75% =
23. 23.664 increased by 75% =
24. 24.285 increased by 60% =
25. 25.450 decreased by 30% =
26. 26.325 increased by 8% =
27. 27.780 decreased by 35% =
28. 28.185 increased by 60% =
29. 29.325 decreased by 20% =
30. 30.280 increased by 15% =
31. 31.215 decreased by 40% =
32. 32.420 decreased by 35% =
33. 33.764 decreased by 75% =
34. 34.775 increased by 12% =
35. 35.340 increased by 10% =
36. 36.755 decreased by 20% =
37. 37.664 increased by 25% =
38. 38.280 increased by 15% =
39. 39.628 increased by 75% =
40. 40.75 increased by 40% =

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