Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 305 · 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. 1.250 increased by 12% =
2. 2.70 increased by 20% =
3. 3.320 decreased by 35% =
4. 4.240 decreased by 5% =
5. 5.280 decreased by 35% =
6. 6.260 decreased by 5% =
7. 7.756 increased by 25% =
8. 8.444 increased by 75% =
9. 9.416 decreased by 25% =
10. 10.330 decreased by 10% =
11. 11.76 decreased by 75% =
12. 12.496 increased by 75% =
13. 13.732 decreased by 25% =
14. 14.610 increased by 10% =
15. 15.44 increased by 75% =
16. 16.740 decreased by 15% =
17. 17.645 decreased by 40% =
18. 18.110 decreased by 20% =
19. 19.450 increased by 40% =
20. 20.105 decreased by 60% =
21. 21.480 increased by 25% =
22. 22.90 increased by 10% =
23. 23.60 increased by 5% =
24. 24.135 increased by 40% =
25. 25.616 increased by 75% =
26. 26.560 decreased by 5% =
27. 27.710 decreased by 30% =
28. 28.700 decreased by 60% =
29. 29.225 increased by 12% =
30. 30.130 increased by 10% =
31. 31.500 increased by 60% =
32. 32.136 increased by 75% =
33. 33.224 decreased by 50% =
34. 34.775 increased by 8% =
35. 35.150 increased by 10% =
36. 36.425 increased by 12% =
37. 37.260 decreased by 5% =
38. 38.400 increased by 8% =
39. 39.648 increased by 25% =
40. 40.330 decreased by 10% =

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