Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 995 · 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. 1.40 decreased by 60% =
2. 2.500 decreased by 8% =
3. 3.755 decreased by 60% =
4. 4.515 decreased by 40% =
5. 5.470 decreased by 60% =
6. 6.740 increased by 30% =
7. 7.610 decreased by 60% =
8. 8.580 increased by 10% =
9. 9.464 decreased by 75% =
10. 10.160 increased by 15% =
11. 11.515 decreased by 20% =
12. 12.515 increased by 60% =
13. 13.244 increased by 75% =
14. 14.220 decreased by 5% =
15. 15.240 decreased by 15% =
16. 16.460 increased by 20% =
17. 17.448 decreased by 25% =
18. 18.180 decreased by 5% =
19. 19.680 increased by 10% =
20. 20.450 increased by 40% =
21. 21.725 increased by 40% =
22. 22.225 decreased by 12% =
23. 23.760 decreased by 5% =
24. 24.648 decreased by 25% =
25. 25.136 decreased by 50% =
26. 26.300 increased by 40% =
27. 27.300 decreased by 60% =
28. 28.505 increased by 40% =
29. 29.108 decreased by 75% =
30. 30.80 increased by 5% =
31. 31.680 increased by 5% =
32. 32.125 decreased by 12% =
33. 33.768 increased by 50% =
34. 34.250 decreased by 10% =
35. 35.320 increased by 5% =
36. 36.528 increased by 75% =
37. 37.96 decreased by 75% =
38. 38.725 increased by 8% =
39. 39.90 increased by 50% =
40. 40.800 increased by 12% =

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