Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 866 · 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. 1.495 increased by 60% =
2. 2.505 increased by 20% =
3. 3.700 decreased by 30% =
4. 4.720 increased by 5% =
5. 5.656 decreased by 50% =
6. 6.775 decreased by 20% =
7. 7.416 increased by 25% =
8. 8.495 increased by 40% =
9. 9.330 decreased by 40% =
10. 10.722 decreased by 50% =
11. 11.430 increased by 10% =
12. 12.325 decreased by 12% =
13. 13.660 increased by 5% =
14. 14.750 increased by 8% =
15. 15.690 decreased by 20% =
16. 16.210 increased by 60% =
17. 17.700 decreased by 12% =
18. 18.392 increased by 25% =
19. 19.775 increased by 8% =
20. 20.700 decreased by 75% =
21. 21.44 increased by 25% =
22. 22.120 increased by 10% =
23. 23.625 decreased by 8% =
24. 24.50 decreased by 30% =
25. 25.720 increased by 10% =
26. 26.620 decreased by 5% =
27. 27.140 decreased by 15% =
28. 28.132 increased by 50% =
29. 29.250 increased by 8% =
30. 30.460 increased by 35% =
31. 31.375 increased by 8% =
32. 32.100 decreased by 35% =
33. 33.560 increased by 5% =
34. 34.800 decreased by 30% =
35. 35.750 increased by 12% =
36. 36.505 decreased by 20% =
37. 37.635 decreased by 20% =
38. 38.295 decreased by 40% =
39. 39.560 decreased by 40% =
40. 40.100 increased by 5% =

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