Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 982 · 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. 1.300 increased by 10% =
2. 2.615 increased by 60% =
3. 3.475 increased by 8% =
4. 4.90 decreased by 30% =
5. 5.450 decreased by 12% =
6. 6.325 increased by 8% =
7. 7.576 decreased by 25% =
8. 8.380 increased by 35% =
9. 9.564 increased by 75% =
10. 10.60 decreased by 10% =
11. 11.175 decreased by 8% =
12. 12.104 decreased by 75% =
13. 13.260 decreased by 5% =
14. 14.265 increased by 60% =
15. 15.640 increased by 5% =
16. 16.155 decreased by 40% =
17. 17.205 decreased by 60% =
18. 18.180 decreased by 35% =
19. 19.510 increased by 10% =
20. 20.525 increased by 20% =
21. 21.340 increased by 30% =
22. 22.160 increased by 10% =
23. 23.720 increased by 10% =
24. 24.460 decreased by 30% =
25. 25.740 decreased by 10% =
26. 26.450 decreased by 10% =
27. 27.580 increased by 10% =
28. 28.330 decreased by 30% =
29. 29.800 decreased by 30% =
30. 30.380 increased by 15% =
31. 31.210 increased by 10% =
32. 32.480 decreased by 10% =
33. 33.65 increased by 40% =
34. 34.420 decreased by 25% =
35. 35.665 decreased by 20% =
36. 36.620 decreased by 15% =
37. 37.160 decreased by 40% =
38. 38.380 increased by 30% =
39. 39.720 decreased by 5% =
40. 40.425 increased by 8% =

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