Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 538 · 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. 1.300 decreased by 5% =
2. 2.240 increased by 15% =
3. 3.260 decreased by 15% =
4. 4.140 decreased by 20% =
5. 5.535 increased by 40% =
6. 6.200 decreased by 5% =
7. 7.636 decreased by 25% =
8. 8.410 decreased by 40% =
9. 9.225 decreased by 12% =
10. 10.155 increased by 20% =
11. 11.720 increased by 75% =
12. 12.160 increased by 60% =
13. 13.624 increased by 50% =
14. 14.700 decreased by 60% =
15. 15.615 decreased by 60% =
16. 16.160 increased by 35% =
17. 17.770 decreased by 30% =
18. 18.100 increased by 15% =
19. 19.265 increased by 20% =
20. 20.510 increased by 20% =
21. 21.180 increased by 5% =
22. 22.80 decreased by 35% =
23. 23.800 decreased by 30% =
24. 24.564 decreased by 50% =
25. 25.580 increased by 15% =
26. 26.185 decreased by 20% =
27. 27.696 increased by 75% =
28. 28.236 decreased by 25% =
29. 29.195 increased by 20% =
30. 30.50 decreased by 12% =
31. 31.180 decreased by 5% =
32. 32.720 increased by 20% =
33. 33.90 decreased by 60% =
34. 34.364 decreased by 75% =
35. 35.120 increased by 5% =
36. 36.280 increased by 60% =
37. 37.444 increased by 75% =
38. 38.625 decreased by 20% =
39. 39.430 increased by 30% =
40. 40.125 decreased by 12% =

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