Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 49 · 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. 1.376 increased by 75% =
2. 2.100 increased by 5% =
3. 3.110 increased by 10% =
4. 4.540 increased by 15% =
5. 5.240 decreased by 5% =
6. 6.145 decreased by 60% =
7. 7.40 increased by 30% =
8. 8.240 increased by 25% =
9. 9.720 increased by 30% =
10. 10.70 decreased by 20% =
11. 11.52 decreased by 50% =
12. 12.260 increased by 25% =
13. 13.800 decreased by 5% =
14. 14.705 decreased by 60% =
15. 15.420 increased by 35% =
16. 16.240 increased by 20% =
17. 17.580 increased by 50% =
18. 18.620 decreased by 20% =
19. 19.295 increased by 40% =
20. 20.348 increased by 75% =
21. 21.340 increased by 35% =
22. 22.720 increased by 15% =
23. 23.540 decreased by 75% =
24. 24.252 increased by 75% =
25. 25.470 decreased by 10% =
26. 26.160 increased by 35% =
27. 27.100 decreased by 15% =
28. 28.60 decreased by 15% =
29. 29.800 increased by 60% =
30. 30.720 increased by 15% =
31. 31.600 decreased by 35% =
32. 32.470 decreased by 30% =
33. 33.140 increased by 15% =
34. 34.220 decreased by 5% =
35. 35.580 increased by 5% =
36. 36.750 increased by 40% =
37. 37.316 increased by 75% =
38. 38.320 increased by 5% =
39. 39.540 increased by 35% =
40. 40.320 decreased by 5% =

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