Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 737 · 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. 1.780 increased by 35% =
2. 2.725 increased by 60% =
3. 3.130 increased by 40% =
4. 4.350 increased by 12% =
5. 5.700 decreased by 30% =
6. 6.150 increased by 40% =
7. 7.500 increased by 8% =
8. 8.700 increased by 35% =
9. 9.330 increased by 20% =
10. 10.700 increased by 40% =
11. 11.135 decreased by 60% =
12. 12.75 decreased by 60% =
13. 13.660 increased by 15% =
14. 14.744 decreased by 25% =
15. 15.180 increased by 15% =
16. 16.680 increased by 40% =
17. 17.360 decreased by 5% =
18. 18.654 increased by 50% =
19. 19.500 decreased by 8% =
20. 20.735 increased by 60% =
21. 21.720 decreased by 5% =
22. 22.600 decreased by 75% =
23. 23.140 decreased by 5% =
24. 24.780 decreased by 15% =
25. 25.480 increased by 35% =
26. 26.240 decreased by 15% =
27. 27.150 increased by 8% =
28. 28.210 decreased by 30% =
29. 29.235 decreased by 20% =
30. 30.440 decreased by 5% =
31. 31.300 increased by 12% =
32. 32.160 increased by 15% =
33. 33.164 decreased by 25% =
34. 34.140 decreased by 5% =
35. 35.784 decreased by 75% =
36. 36.770 decreased by 60% =
37. 37.728 increased by 25% =
38. 38.475 decreased by 12% =
39. 39.420 decreased by 30% =
40. 40.70 decreased by 50% =

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