Answer: 60%
Explanation:
In order to find the percentage, we need to find the sum of the espressos ordered.
57 + 38 = 95
95 will be our denominator, and since we are trying to find the percentage of the single-shot, our numerator is going to be 57 because that is how many sold.
57 / 95
Now we can divide 57 by 95 to get the percent of single shot espressos to get an answer of 60%