Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 791 · 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. 1.680 increased by 5% =
2. 2.260 decreased by 50% =
3. 3.720 increased by 20% =
4. 4.660 decreased by 20% =
5. 5.416 decreased by 75% =
6. 6.315 decreased by 60% =
7. 7.440 increased by 15% =
8. 8.796 increased by 25% =
9. 9.580 increased by 15% =
10. 10.220 increased by 35% =
11. 11.480 decreased by 35% =
12. 12.748 increased by 75% =
13. 13.720 decreased by 5% =
14. 14.324 increased by 75% =
15. 15.300 decreased by 35% =
16. 16.208 increased by 50% =
17. 17.240 decreased by 5% =
18. 18.255 increased by 60% =
19. 19.200 increased by 5% =
20. 20.170 decreased by 10% =
21. 21.720 increased by 60% =
22. 22.420 decreased by 35% =
23. 23.40 increased by 30% =
24. 24.310 increased by 30% =
25. 25.730 increased by 30% =
26. 26.560 decreased by 35% =
27. 27.490 increased by 30% =
28. 28.660 increased by 5% =
29. 29.334 increased by 50% =
30. 30.365 decreased by 40% =
31. 31.130 increased by 20% =
32. 32.496 increased by 50% =
33. 33.125 increased by 8% =
34. 34.685 increased by 40% =
35. 35.264 decreased by 25% =
36. 36.155 decreased by 60% =
37. 37.555 increased by 20% =
38. 38.340 increased by 15% =
39. 39.550 increased by 12% =
40. 40.500 increased by 75% =

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