There are approximately 4lbs of muscle for every 7lbs of body weight of a certain animal, how much of the weight is muscle?

4/7 of the weight

To calculate the amount of weight that is muscle, you need to use the given ratio of 4 pounds of muscle for every 7 pounds of body weight for the animal. Here's how you can calculate it:

Step 1: Determine the total weight of the animal.
Let's assume the animal weighs 'x' pounds.

Step 2: Calculate the amount of muscle.
According to the given ratio, for every 7 pounds of body weight, there are 4 pounds of muscle. So, for 'x' pounds of body weight, we can calculate the amount of muscle as:
Muscle weight = (4/7) * x

To find the weight of muscle as a fraction of the animal's total weight, you can use the equation:
Muscle weight / Total weight = (4/7) * x / x

Simplifying the equation, we get:
Muscle weight / Total weight = 4/7

Therefore, approximately 4/7 of the animal's weight is muscle.