Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 536 · 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. 1.380 increased by 5% =
2. 2.360 increased by 15% =
3. 3.460 decreased by 35% =
4. 4.400 increased by 12% =
5. 5.420 increased by 35% =
6. 6.555 increased by 60% =
7. 7.40 increased by 15% =
8. 8.400 increased by 8% =
9. 9.380 decreased by 35% =
10. 10.740 increased by 10% =
11. 11.405 increased by 40% =
12. 12.225 increased by 8% =
13. 13.628 increased by 75% =
14. 14.740 increased by 10% =
15. 15.165 decreased by 20% =
16. 16.675 increased by 12% =
17. 17.520 decreased by 40% =
18. 18.260 increased by 5% =
19. 19.454 increased by 50% =
20. 20.650 increased by 8% =
21. 21.616 decreased by 50% =
22. 22.580 decreased by 15% =
23. 23.510 increased by 40% =
24. 24.680 decreased by 50% =
25. 25.680 increased by 30% =
26. 26.800 increased by 15% =
27. 27.310 increased by 20% =
28. 28.725 decreased by 8% =
29. 29.440 decreased by 75% =
30. 30.180 increased by 20% =
31. 31.140 decreased by 35% =
32. 32.125 increased by 8% =
33. 33.740 decreased by 35% =
34. 34.690 increased by 40% =
35. 35.424 decreased by 25% =
36. 36.40 increased by 15% =
37. 37.236 decreased by 50% =
38. 38.120 decreased by 15% =
39. 39.260 decreased by 5% =
40. 40.412 increased by 25% =

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