Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 201 · 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. 1.540 increased by 35% =
2. 2.320 increased by 10% =
3. 3.295 increased by 40% =
4. 4.444 increased by 25% =
5. 5.580 decreased by 35% =
6. 6.135 increased by 20% =
7. 7.670 decreased by 50% =
8. 8.650 decreased by 10% =
9. 9.110 increased by 40% =
10. 10.100 decreased by 35% =
11. 11.280 decreased by 30% =
12. 12.700 decreased by 5% =
13. 13.40 decreased by 15% =
14. 14.328 decreased by 75% =
15. 15.780 increased by 40% =
16. 16.535 increased by 60% =
17. 17.490 increased by 10% =
18. 18.210 increased by 10% =
19. 19.382 increased by 50% =
20. 20.80 increased by 50% =
21. 21.50 decreased by 8% =
22. 22.340 decreased by 35% =
23. 23.720 increased by 15% =
24. 24.150 decreased by 8% =
25. 25.175 increased by 8% =
26. 26.468 decreased by 50% =
27. 27.565 decreased by 20% =
28. 28.785 increased by 20% =
29. 29.360 increased by 5% =
30. 30.624 increased by 75% =
31. 31.280 decreased by 15% =
32. 32.770 increased by 60% =
33. 33.688 decreased by 75% =
34. 34.408 increased by 50% =
35. 35.45 decreased by 20% =
36. 36.460 increased by 35% =
37. 37.75 increased by 8% =
38. 38.684 increased by 25% =
39. 39.240 increased by 20% =
40. 40.750 decreased by 12% =

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