Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 757 · 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. 1.150 increased by 30% =
2. 2.185 increased by 40% =
3. 3.500 increased by 5% =
4. 4.440 increased by 30% =
5. 5.300 decreased by 15% =
6. 6.200 decreased by 35% =
7. 7.525 decreased by 12% =
8. 8.370 increased by 40% =
9. 9.190 increased by 20% =
10. 10.640 increased by 10% =
11. 11.660 decreased by 5% =
12. 12.600 increased by 12% =
13. 13.510 increased by 60% =
14. 14.500 increased by 12% =
15. 15.210 decreased by 20% =
16. 16.256 decreased by 75% =
17. 17.230 decreased by 30% =
18. 18.800 increased by 8% =
19. 19.460 decreased by 75% =
20. 20.424 decreased by 75% =
21. 21.150 increased by 30% =
22. 22.620 increased by 15% =
23. 23.54 decreased by 50% =
24. 24.195 increased by 60% =
25. 25.500 increased by 15% =
26. 26.450 decreased by 8% =
27. 27.140 increased by 30% =
28. 28.530 decreased by 40% =
29. 29.140 decreased by 40% =
30. 30.50 increased by 10% =
31. 31.620 decreased by 50% =
32. 32.580 decreased by 15% =
33. 33.200 increased by 12% =
34. 34.380 decreased by 10% =
35. 35.480 increased by 30% =
36. 36.392 increased by 75% =
37. 37.210 increased by 30% =
38. 38.370 decreased by 60% =
39. 39.125 decreased by 12% =
40. 40.768 increased by 50% =

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