Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 482 · 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. 1.90 increased by 40% =
2. 2.175 decreased by 60% =
3. 3.300 increased by 15% =
4. 4.580 decreased by 30% =
5. 5.95 increased by 60% =
6. 6.775 decreased by 12% =
7. 7.300 decreased by 5% =
8. 8.550 decreased by 8% =
9. 9.720 increased by 20% =
10. 10.532 decreased by 50% =
11. 11.630 decreased by 30% =
12. 12.220 increased by 15% =
13. 13.725 decreased by 12% =
14. 14.100 decreased by 5% =
15. 15.460 decreased by 5% =
16. 16.200 increased by 8% =
17. 17.340 increased by 15% =
18. 18.735 decreased by 40% =
19. 19.115 increased by 40% =
20. 20.460 increased by 40% =
21. 21.320 increased by 5% =
22. 22.754 decreased by 50% =
23. 23.492 decreased by 25% =
24. 24.520 decreased by 15% =
25. 25.550 decreased by 8% =
26. 26.235 increased by 20% =
27. 27.760 decreased by 75% =
28. 28.95 increased by 40% =
29. 29.480 decreased by 5% =
30. 30.475 decreased by 20% =
31. 31.780 increased by 30% =
32. 32.800 decreased by 40% =
33. 33.380 decreased by 5% =
34. 34.80 decreased by 40% =
35. 35.140 decreased by 5% =
36. 36.100 decreased by 5% =
37. 37.230 decreased by 30% =
38. 38.580 increased by 15% =
39. 39.510 decreased by 60% =
40. 40.80 decreased by 5% =

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