Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 557 · 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. 1.470 increased by 10% =
2. 2.750 increased by 60% =
3. 3.280 decreased by 60% =
4. 4.300 increased by 5% =
5. 5.770 increased by 20% =
6. 6.796 decreased by 25% =
7. 7.705 decreased by 20% =
8. 8.288 increased by 75% =
9. 9.140 decreased by 25% =
10. 10.125 increased by 8% =
11. 11.355 decreased by 20% =
12. 12.220 increased by 10% =
13. 13.740 increased by 15% =
14. 14.240 decreased by 30% =
15. 15.575 decreased by 12% =
16. 16.595 increased by 20% =
17. 17.215 decreased by 20% =
18. 18.240 increased by 30% =
19. 19.250 increased by 8% =
20. 20.120 decreased by 5% =
21. 21.80 decreased by 5% =
22. 22.160 decreased by 75% =
23. 23.455 decreased by 60% =
24. 24.525 decreased by 12% =
25. 25.680 increased by 15% =
26. 26.125 decreased by 8% =
27. 27.330 increased by 10% =
28. 28.175 decreased by 60% =
29. 29.60 increased by 5% =
30. 30.765 increased by 60% =
31. 31.740 decreased by 35% =
32. 32.550 increased by 8% =
33. 33.330 decreased by 60% =
34. 34.600 decreased by 50% =
35. 35.150 increased by 8% =
36. 36.475 decreased by 8% =
37. 37.475 increased by 8% =
38. 38.740 decreased by 5% =
39. 39.66 increased by 50% =
40. 40.355 decreased by 20% =

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