Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 988 · 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. 1.794 decreased by 50% =
2. 2.600 decreased by 40% =
3. 3.730 increased by 10% =
4. 4.500 decreased by 8% =
5. 5.480 decreased by 60% =
6. 6.440 increased by 10% =
7. 7.80 increased by 5% =
8. 8.350 increased by 8% =
9. 9.760 increased by 60% =
10. 10.300 increased by 8% =
11. 11.40 decreased by 5% =
12. 12.230 increased by 30% =
13. 13.440 increased by 30% =
14. 14.140 decreased by 5% =
15. 15.160 decreased by 75% =
16. 16.420 decreased by 35% =
17. 17.750 increased by 8% =
18. 18.300 increased by 75% =
19. 19.265 increased by 20% =
20. 20.135 decreased by 20% =
21. 21.520 increased by 15% =
22. 22.40 increased by 5% =
23. 23.732 decreased by 50% =
24. 24.700 increased by 12% =
25. 25.150 decreased by 8% =
26. 26.375 increased by 8% =
27. 27.696 increased by 75% =
28. 28.630 increased by 30% =
29. 29.145 increased by 60% =
30. 30.640 decreased by 30% =
31. 31.75 increased by 8% =
32. 32.515 increased by 60% =
33. 33.420 decreased by 15% =
34. 34.60 decreased by 15% =
35. 35.400 decreased by 5% =
36. 36.105 decreased by 60% =
37. 37.668 increased by 75% =
38. 38.570 decreased by 60% =
39. 39.748 increased by 75% =
40. 40.180 decreased by 75% =

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