Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 469 · 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. 1.165 increased by 40% =
2. 2.50 increased by 10% =
3. 3.660 increased by 10% =
4. 4.115 decreased by 20% =
5. 5.420 decreased by 35% =
6. 6.350 increased by 12% =
7. 7.120 increased by 20% =
8. 8.528 decreased by 75% =
9. 9.400 increased by 10% =
10. 10.440 increased by 5% =
11. 11.180 decreased by 10% =
12. 12.190 increased by 20% =
13. 13.492 increased by 75% =
14. 14.624 increased by 25% =
15. 15.240 decreased by 15% =
16. 16.720 increased by 50% =
17. 17.532 increased by 50% =
18. 18.360 decreased by 5% =
19. 19.130 decreased by 20% =
20. 20.140 increased by 60% =
21. 21.675 decreased by 8% =
22. 22.310 decreased by 10% =
23. 23.200 increased by 5% =
24. 24.64 decreased by 50% =
25. 25.85 decreased by 20% =
26. 26.505 increased by 60% =
27. 27.100 decreased by 15% =
28. 28.300 decreased by 12% =
29. 29.755 increased by 40% =
30. 30.775 increased by 12% =
31. 31.300 decreased by 5% =
32. 32.305 increased by 40% =
33. 33.120 decreased by 5% =
34. 34.300 decreased by 50% =
35. 35.340 decreased by 25% =
36. 36.164 increased by 25% =
37. 37.345 increased by 40% =
38. 38.600 increased by 15% =
39. 39.410 decreased by 10% =
40. 40.150 decreased by 12% =

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