Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 761 · 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. 1.625 increased by 8% =
2. 2.572 decreased by 75% =
3. 3.708 decreased by 75% =
4. 4.215 increased by 40% =
5. 5.720 increased by 35% =
6. 6.200 decreased by 10% =
7. 7.380 increased by 15% =
8. 8.600 decreased by 35% =
9. 9.160 decreased by 5% =
10. 10.120 increased by 15% =
11. 11.460 decreased by 15% =
12. 12.360 increased by 35% =
13. 13.412 increased by 25% =
14. 14.300 decreased by 20% =
15. 15.165 increased by 60% =
16. 16.116 decreased by 25% =
17. 17.120 decreased by 40% =
18. 18.400 decreased by 35% =
19. 19.420 decreased by 5% =
20. 20.616 decreased by 50% =
21. 21.230 increased by 60% =
22. 22.68 increased by 50% =
23. 23.500 decreased by 30% =
24. 24.326 increased by 50% =
25. 25.564 increased by 25% =
26. 26.540 decreased by 20% =
27. 27.600 increased by 35% =
28. 28.745 increased by 20% =
29. 29.640 decreased by 15% =
30. 30.355 increased by 20% =
31. 31.500 decreased by 30% =
32. 32.800 decreased by 8% =
33. 33.360 decreased by 30% =
34. 34.205 increased by 20% =
35. 35.220 increased by 20% =
36. 36.50 decreased by 12% =
37. 37.360 decreased by 5% =
38. 38.50 increased by 12% =
39. 39.684 increased by 75% =
40. 40.310 increased by 40% =

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