Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 514 · 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. 1.572 increased by 75% =
2. 2.460 decreased by 35% =
3. 3.475 decreased by 8% =
4. 4.420 decreased by 35% =
5. 5.560 decreased by 25% =
6. 6.320 increased by 5% =
7. 7.344 decreased by 75% =
8. 8.240 increased by 35% =
9. 9.400 increased by 50% =
10. 10.692 decreased by 75% =
11. 11.420 increased by 15% =
12. 12.150 decreased by 12% =
13. 13.344 decreased by 25% =
14. 14.710 decreased by 10% =
15. 15.476 increased by 75% =
16. 16.660 increased by 20% =
17. 17.50 decreased by 12% =
18. 18.410 decreased by 60% =
19. 19.56 decreased by 50% =
20. 20.260 increased by 20% =
21. 21.80 increased by 5% =
22. 22.325 decreased by 40% =
23. 23.628 decreased by 75% =
24. 24.696 decreased by 25% =
25. 25.736 decreased by 50% =
26. 26.160 increased by 5% =
27. 27.376 increased by 25% =
28. 28.300 decreased by 35% =
29. 29.296 decreased by 75% =
30. 30.200 increased by 20% =
31. 31.60 increased by 10% =
32. 32.800 decreased by 50% =
33. 33.560 decreased by 30% =
34. 34.424 increased by 50% =
35. 35.192 decreased by 75% =
36. 36.50 decreased by 8% =
37. 37.120 increased by 15% =
38. 38.300 increased by 12% =
39. 39.572 decreased by 25% =
40. 40.225 increased by 12% =

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