Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 321 · 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. 1.790 increased by 40% =
2. 2.300 increased by 10% =
3. 3.765 decreased by 20% =
4. 4.225 decreased by 20% =
5. 5.650 increased by 30% =
6. 6.295 decreased by 20% =
7. 7.255 increased by 60% =
8. 8.440 increased by 30% =
9. 9.505 decreased by 20% =
10. 10.205 increased by 40% =
11. 11.125 increased by 12% =
12. 12.440 increased by 75% =
13. 13.124 increased by 25% =
14. 14.720 increased by 5% =
15. 15.260 decreased by 20% =
16. 16.340 increased by 35% =
17. 17.280 decreased by 15% =
18. 18.595 increased by 60% =
19. 19.620 decreased by 35% =
20. 20.250 decreased by 12% =
21. 21.296 decreased by 75% =
22. 22.280 decreased by 15% =
23. 23.380 decreased by 15% =
24. 24.580 decreased by 5% =
25. 25.305 increased by 40% =
26. 26.125 decreased by 12% =
27. 27.260 decreased by 10% =
28. 28.580 decreased by 15% =
29. 29.160 increased by 35% =
30. 30.460 decreased by 40% =
31. 31.215 decreased by 60% =
32. 32.476 increased by 75% =
33. 33.200 decreased by 10% =
34. 34.375 decreased by 20% =
35. 35.235 decreased by 60% =
36. 36.568 increased by 75% =
37. 37.340 decreased by 5% =
38. 38.70 increased by 10% =
39. 39.712 decreased by 50% =
40. 40.760 increased by 15% =

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