Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 327 · 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. 1.100 increased by 8% =
2. 2.420 increased by 5% =
3. 3.400 decreased by 5% =
4. 4.70 increased by 50% =
5. 5.248 increased by 25% =
6. 6.610 increased by 20% =
7. 7.340 decreased by 40% =
8. 8.640 increased by 15% =
9. 9.500 increased by 75% =
10. 10.210 increased by 10% =
11. 11.584 decreased by 25% =
12. 12.800 increased by 10% =
13. 13.584 increased by 25% =
14. 14.305 increased by 40% =
15. 15.500 decreased by 20% =
16. 16.55 increased by 20% =
17. 17.550 increased by 8% =
18. 18.665 decreased by 60% =
19. 19.270 decreased by 10% =
20. 20.140 decreased by 60% =
21. 21.680 decreased by 10% =
22. 22.460 increased by 20% =
23. 23.640 increased by 10% =
24. 24.190 decreased by 30% =
25. 25.400 decreased by 5% =
26. 26.725 increased by 60% =
27. 27.740 decreased by 10% =
28. 28.500 decreased by 20% =
29. 29.80 decreased by 75% =
30. 30.800 decreased by 15% =
31. 31.220 decreased by 35% =
32. 32.364 increased by 75% =
33. 33.350 increased by 12% =
34. 34.670 decreased by 10% =
35. 35.720 increased by 15% =
36. 36.56 decreased by 75% =
37. 37.712 increased by 75% =
38. 38.125 decreased by 20% =
39. 39.660 increased by 10% =
40. 40.175 decreased by 60% =

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