Answer: The freshwater fish swam 28 feet
Explanation:
Hi, to answer this we simply have to multiply total depth of the lake (32) by the fraction that the freshwater fish swam (7/8).
Mathematically speaking:
32 x (7/8) = 224/8 =28 feet
So, in conclusion, the freshwater fish swam 28 feet
Feel free to ask for more if needed or if you did not understand something.