Given :
1 batch of brownies required 15 cup of chocolate.
To Find :
If she has 8/10 cup of chocolate remaining, how many batches of brownies can Mary make.
Solution :
Ratio of cups to batch is :
![R=(15)/(1)](https://img.qammunity.org/2021/formulas/mathematics/high-school/e7pys26yuynp5j7tok8n7ad17rmypa9oa7.png)
Let , batch produced from 8/10 cup of chocolate is x.
So ,
![((8)/(10))/(x)=(15)/(1)\\\\x=(8)/(10* 15)\\\\x=0.053\ batches](https://img.qammunity.org/2021/formulas/mathematics/high-school/llzw0nggawn0p1wu8rnhyxs010j04a81s4.png)
Therefore , she can make 0.053 of a batch.
Hence , this is the required solution.