Answer:
60%
Explanation:
To find the answer to this equation, you need to use the percent composition formula. It is as follows:
![(part)/(whole) * 100 = percent](https://img.qammunity.org/2021/formulas/mathematics/college/e8v0zi3xiy6membil67qkgha6dj12yjqud.png)
Let's plug in what the question gives us into the equation:
![(57)/(90) *100 = 60](https://img.qammunity.org/2021/formulas/mathematics/college/1tzvf192qa8s002vfwwakz7crqihtxx2vv.png)
Therefore, the answer to your question is 60%!
Hope this helps!!
- Kay :)