Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 45 · 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. 1.104 increased by 75% =
2. 2.140 increased by 5% =
3. 3.100 increased by 12% =
4. 4.175 decreased by 8% =
5. 5.610 increased by 40% =
6. 6.442 decreased by 50% =
7. 7.300 increased by 8% =
8. 8.500 increased by 15% =
9. 9.772 increased by 25% =
10. 10.640 increased by 35% =
11. 11.92 increased by 75% =
12. 12.420 increased by 35% =
13. 13.75 increased by 8% =
14. 14.440 increased by 10% =
15. 15.490 decreased by 30% =
16. 16.248 decreased by 75% =
17. 17.150 increased by 12% =
18. 18.155 increased by 60% =
19. 19.630 increased by 60% =
20. 20.448 decreased by 75% =
21. 21.450 increased by 10% =
22. 22.44 decreased by 75% =
23. 23.230 increased by 40% =
24. 24.320 increased by 25% =
25. 25.640 increased by 5% =
26. 26.310 decreased by 10% =
27. 27.750 decreased by 12% =
28. 28.80 decreased by 35% =
29. 29.528 increased by 50% =
30. 30.340 decreased by 20% =
31. 31.740 increased by 30% =
32. 32.140 increased by 5% =
33. 33.508 increased by 75% =
34. 34.760 decreased by 60% =
35. 35.345 decreased by 60% =
36. 36.110 decreased by 30% =
37. 37.656 increased by 75% =
38. 38.570 increased by 40% =
39. 39.316 decreased by 25% =
40. 40.180 increased by 30% =

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