the sum of 3 numbers divided by its product
The phrase 3 numbers means we choose 3 arbitrary variables. Let's call them x, y, z.
The sum of of these 3 numbers is:
x + y + z
The phrase its product means we multiply all 3 arbitrary variables together:
xyz
Now, the phrase divided by means we divide x + y + z by xyz:
(x + y + z)/xyz
The phrase 3 numbers means we choose 3 arbitrary variables. Let's call them x, y, z.
The sum of of these 3 numbers is:
x + y + z
The phrase its product means we multiply all 3 arbitrary variables together:
xyz
Now, the phrase divided by means we divide x + y + z by xyz:
(x + y + z)/xyz