Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 357 · 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. 1.260 decreased by 60% =
2. 2.508 increased by 75% =
3. 3.315 increased by 40% =
4. 4.750 decreased by 8% =
5. 5.320 increased by 5% =
6. 6.480 decreased by 5% =
7. 7.60 decreased by 40% =
8. 8.220 decreased by 35% =
9. 9.340 decreased by 30% =
10. 10.700 increased by 15% =
11. 11.284 increased by 25% =
12. 12.540 increased by 5% =
13. 13.514 increased by 50% =
14. 14.344 increased by 25% =
15. 15.710 decreased by 40% =
16. 16.62 decreased by 50% =
17. 17.700 decreased by 10% =
18. 18.184 increased by 25% =
19. 19.500 decreased by 15% =
20. 20.574 increased by 50% =
21. 21.380 decreased by 60% =
22. 22.515 increased by 20% =
23. 23.580 increased by 30% =
24. 24.175 increased by 8% =
25. 25.522 decreased by 50% =
26. 26.240 increased by 50% =
27. 27.225 increased by 12% =
28. 28.540 increased by 5% =
29. 29.180 decreased by 10% =
30. 30.450 increased by 60% =
31. 31.440 increased by 30% =
32. 32.700 decreased by 35% =
33. 33.360 decreased by 75% =
34. 34.600 increased by 5% =
35. 35.175 increased by 8% =
36. 36.215 decreased by 40% =
37. 37.280 decreased by 15% =
38. 38.380 decreased by 15% =
39. 39.140 increased by 15% =
40. 40.200 decreased by 8% =

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