Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 903 · 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. 1.65 increased by 20% =
2. 2.248 decreased by 75% =
3. 3.300 decreased by 8% =
4. 4.420 decreased by 30% =
5. 5.210 increased by 10% =
6. 6.520 decreased by 5% =
7. 7.540 increased by 5% =
8. 8.180 decreased by 15% =
9. 9.125 increased by 12% =
10. 10.230 increased by 60% =
11. 11.476 increased by 25% =
12. 12.760 decreased by 10% =
13. 13.390 decreased by 30% =
14. 14.740 decreased by 25% =
15. 15.530 increased by 10% =
16. 16.790 decreased by 10% =
17. 17.280 increased by 15% =
18. 18.220 increased by 10% =
19. 19.368 decreased by 75% =
20. 20.370 increased by 30% =
21. 21.620 increased by 15% =
22. 22.660 increased by 15% =
23. 23.80 decreased by 30% =
24. 24.735 increased by 40% =
25. 25.520 decreased by 15% =
26. 26.670 decreased by 20% =
27. 27.500 decreased by 40% =
28. 28.188 increased by 75% =
29. 29.440 decreased by 10% =
30. 30.420 increased by 15% =
31. 31.580 increased by 5% =
32. 32.205 increased by 20% =
33. 33.775 decreased by 12% =
34. 34.430 decreased by 20% =
35. 35.376 decreased by 25% =
36. 36.780 decreased by 5% =
37. 37.525 decreased by 60% =
38. 38.700 increased by 12% =
39. 39.220 increased by 30% =
40. 40.664 increased by 25% =

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