Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 584 · 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 10% =
2. 2.490 increased by 50% =
3. 3.284 decreased by 25% =
4. 4.575 decreased by 12% =
5. 5.200 increased by 35% =
6. 6.128 decreased by 25% =
7. 7.760 increased by 15% =
8. 8.120 decreased by 35% =
9. 9.120 increased by 75% =
10. 10.80 decreased by 15% =
11. 11.460 increased by 5% =
12. 12.760 increased by 5% =
13. 13.752 decreased by 25% =
14. 14.100 increased by 15% =
15. 15.685 increased by 60% =
16. 16.500 increased by 5% =
17. 17.600 increased by 60% =
18. 18.420 decreased by 35% =
19. 19.210 increased by 20% =
20. 20.570 increased by 30% =
21. 21.535 increased by 20% =
22. 22.236 increased by 50% =
23. 23.115 decreased by 40% =
24. 24.275 increased by 12% =
25. 25.656 decreased by 25% =
26. 26.75 increased by 8% =
27. 27.720 decreased by 15% =
28. 28.608 decreased by 75% =
29. 29.150 increased by 10% =
30. 30.610 decreased by 10% =
31. 31.175 increased by 8% =
32. 32.120 decreased by 15% =
33. 33.605 decreased by 60% =
34. 34.150 increased by 30% =
35. 35.215 increased by 20% =
36. 36.450 increased by 30% =
37. 37.130 decreased by 20% =
38. 38.225 increased by 20% =
39. 39.80 decreased by 5% =
40. 40.285 decreased by 60% =

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