Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 794 · 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. 1.560 decreased by 40% =
2. 2.300 increased by 35% =
3. 3.255 decreased by 60% =
4. 4.180 decreased by 35% =
5. 5.475 decreased by 8% =
6. 6.80 increased by 25% =
7. 7.340 decreased by 35% =
8. 8.360 increased by 35% =
9. 9.775 increased by 12% =
10. 10.120 increased by 5% =
11. 11.416 increased by 75% =
12. 12.246 increased by 50% =
13. 13.60 decreased by 35% =
14. 14.176 increased by 75% =
15. 15.795 decreased by 20% =
16. 16.600 increased by 5% =
17. 17.184 decreased by 25% =
18. 18.520 increased by 10% =
19. 19.275 increased by 12% =
20. 20.220 decreased by 75% =
21. 21.690 increased by 30% =
22. 22.160 decreased by 40% =
23. 23.80 decreased by 15% =
24. 24.400 increased by 5% =
25. 25.325 increased by 20% =
26. 26.428 increased by 75% =
27. 27.120 decreased by 10% =
28. 28.354 increased by 50% =
29. 29.264 decreased by 75% =
30. 30.150 decreased by 60% =
31. 31.300 decreased by 8% =
32. 32.580 decreased by 15% =
33. 33.180 increased by 5% =
34. 34.735 increased by 20% =
35. 35.76 increased by 75% =
36. 36.400 increased by 12% =
37. 37.290 decreased by 60% =
38. 38.290 increased by 20% =
39. 39.720 increased by 60% =
40. 40.720 increased by 35% =

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