Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 864 · 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. 1.288 increased by 75% =
2. 2.125 increased by 12% =
3. 3.160 decreased by 35% =
4. 4.225 decreased by 12% =
5. 5.398 increased by 50% =
6. 6.235 increased by 20% =
7. 7.160 increased by 60% =
8. 8.100 increased by 12% =
9. 9.68 decreased by 75% =
10. 10.650 decreased by 30% =
11. 11.310 increased by 10% =
12. 12.340 increased by 35% =
13. 13.720 increased by 35% =
14. 14.540 decreased by 30% =
15. 15.324 increased by 75% =
16. 16.575 decreased by 12% =
17. 17.124 decreased by 50% =
18. 18.292 increased by 75% =
19. 19.240 increased by 35% =
20. 20.625 increased by 8% =
21. 21.485 increased by 60% =
22. 22.40 decreased by 15% =
23. 23.60 increased by 20% =
24. 24.740 decreased by 5% =
25. 25.420 decreased by 30% =
26. 26.800 increased by 30% =
27. 27.330 decreased by 20% =
28. 28.795 increased by 20% =
29. 29.705 decreased by 20% =
30. 30.152 increased by 75% =
31. 31.540 increased by 10% =
32. 32.60 increased by 5% =
33. 33.424 increased by 25% =
34. 34.790 increased by 10% =
35. 35.296 increased by 50% =
36. 36.560 increased by 15% =
37. 37.205 increased by 40% =
38. 38.120 increased by 15% =
39. 39.400 decreased by 5% =
40. 40.525 increased by 12% =

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