Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 30 · 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. 1.548 increased by 25% =
2. 2.272 increased by 75% =
3. 3.310 increased by 10% =
4. 4.440 decreased by 5% =
5. 5.200 increased by 10% =
6. 6.498 decreased by 50% =
7. 7.800 decreased by 15% =
8. 8.532 increased by 75% =
9. 9.620 increased by 5% =
10. 10.448 increased by 75% =
11. 11.230 decreased by 10% =
12. 12.550 increased by 50% =
13. 13.625 increased by 40% =
14. 14.740 decreased by 60% =
15. 15.665 decreased by 20% =
16. 16.232 increased by 75% =
17. 17.376 decreased by 25% =
18. 18.720 increased by 30% =
19. 19.770 increased by 10% =
20. 20.755 decreased by 40% =
21. 21.345 increased by 20% =
22. 22.598 decreased by 50% =
23. 23.400 increased by 5% =
24. 24.560 decreased by 15% =
25. 25.260 increased by 15% =
26. 26.156 increased by 25% =
27. 27.180 increased by 15% =
28. 28.350 decreased by 10% =
29. 29.264 increased by 25% =
30. 30.80 increased by 10% =
31. 31.305 decreased by 60% =
32. 32.405 decreased by 20% =
33. 33.300 decreased by 15% =
34. 34.180 decreased by 5% =
35. 35.680 increased by 5% =
36. 36.360 decreased by 30% =
37. 37.176 decreased by 25% =
38. 38.260 increased by 5% =
39. 39.600 increased by 12% =
40. 40.450 increased by 20% =

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