Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 194 · 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. 1.560 increased by 5% =
2. 2.750 increased by 12% =
3. 3.246 increased by 50% =
4. 4.420 increased by 10% =
5. 5.190 decreased by 30% =
6. 6.524 decreased by 25% =
7. 7.356 increased by 50% =
8. 8.140 increased by 5% =
9. 9.260 increased by 20% =
10. 10.460 increased by 5% =
11. 11.600 increased by 40% =
12. 12.90 increased by 30% =
13. 13.110 increased by 30% =
14. 14.645 increased by 40% =
15. 15.150 decreased by 30% =
16. 16.496 decreased by 25% =
17. 17.725 increased by 8% =
18. 18.100 increased by 35% =
19. 19.105 increased by 40% =
20. 20.390 increased by 30% =
21. 21.192 decreased by 25% =
22. 22.180 increased by 15% =
23. 23.90 increased by 40% =
24. 24.744 decreased by 75% =
25. 25.740 increased by 35% =
26. 26.195 increased by 60% =
27. 27.520 decreased by 35% =
28. 28.660 decreased by 5% =
29. 29.648 increased by 75% =
30. 30.380 decreased by 35% =
31. 31.675 decreased by 12% =
32. 32.296 decreased by 75% =
33. 33.440 decreased by 40% =
34. 34.760 decreased by 15% =
35. 35.80 increased by 5% =
36. 36.412 decreased by 75% =
37. 37.236 increased by 75% =
38. 38.225 increased by 8% =
39. 39.272 decreased by 25% =
40. 40.675 increased by 8% =

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