Answer:
![L + (5)/(8) = 1](https://img.qammunity.org/2021/formulas/mathematics/college/ogxnlesf4y5gyslx5xiio3vgvtvqk75ati.png)
Explanation:
Given
A cup of coffee
Kelly drank 5/8 of the coffee
Required
Determine how much is left
Start by representing the amount of coffee left with L
Because the amount of coffee Kelly drank is in fraction (5/8), the total cup of coffee will equate to 1;
Hence, the addition equation as requested in the question to represent the scenario is
![L + (5)/(8) = 1](https://img.qammunity.org/2021/formulas/mathematics/college/ogxnlesf4y5gyslx5xiio3vgvtvqk75ati.png)