Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 204 · 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. 1.500 decreased by 5% =
2. 2.200 decreased by 8% =
3. 3.100 decreased by 25% =
4. 4.396 decreased by 50% =
5. 5.620 decreased by 75% =
6. 6.620 increased by 35% =
7. 7.160 increased by 15% =
8. 8.524 increased by 25% =
9. 9.230 increased by 30% =
10. 10.400 increased by 35% =
11. 11.675 increased by 12% =
12. 12.600 increased by 30% =
13. 13.520 increased by 30% =
14. 14.520 decreased by 25% =
15. 15.100 increased by 15% =
16. 16.775 decreased by 8% =
17. 17.95 decreased by 20% =
18. 18.580 decreased by 10% =
19. 19.360 increased by 15% =
20. 20.375 decreased by 8% =
21. 21.420 increased by 50% =
22. 22.640 decreased by 5% =
23. 23.660 increased by 35% =
24. 24.200 decreased by 12% =
25. 25.538 increased by 50% =
26. 26.600 increased by 5% =
27. 27.720 decreased by 20% =
28. 28.226 decreased by 50% =
29. 29.336 decreased by 25% =
30. 30.400 increased by 30% =
31. 31.800 increased by 30% =
32. 32.680 increased by 15% =
33. 33.190 increased by 30% =
34. 34.600 increased by 12% =
35. 35.640 increased by 10% =
36. 36.340 increased by 20% =
37. 37.240 increased by 20% =
38. 38.255 increased by 40% =
39. 39.680 increased by 35% =
40. 40.500 decreased by 10% =

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