Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 213 · 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. 1.320 increased by 15% =
2. 2.85 increased by 60% =
3. 3.44 decreased by 75% =
4. 4.720 increased by 35% =
5. 5.480 increased by 30% =
6. 6.620 decreased by 5% =
7. 7.300 increased by 15% =
8. 8.560 decreased by 15% =
9. 9.640 increased by 15% =
10. 10.380 increased by 5% =
11. 11.610 decreased by 40% =
12. 12.665 increased by 40% =
13. 13.740 decreased by 75% =
14. 14.656 decreased by 25% =
15. 15.765 increased by 60% =
16. 16.200 increased by 5% =
17. 17.280 decreased by 10% =
18. 18.675 decreased by 8% =
19. 19.720 increased by 10% =
20. 20.172 decreased by 50% =
21. 21.595 increased by 20% =
22. 22.650 decreased by 12% =
23. 23.268 increased by 75% =
24. 24.185 increased by 40% =
25. 25.580 increased by 5% =
26. 26.60 increased by 60% =
27. 27.110 decreased by 30% =
28. 28.800 increased by 10% =
29. 29.640 increased by 35% =
30. 30.350 decreased by 8% =
31. 31.80 decreased by 20% =
32. 32.625 decreased by 12% =
33. 33.300 increased by 10% =
34. 34.172 decreased by 50% =
35. 35.380 increased by 30% =
36. 36.520 decreased by 30% =
37. 37.276 increased by 75% =
38. 38.640 decreased by 15% =
39. 39.296 decreased by 75% =
40. 40.420 decreased by 35% =

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