To find the missing number in this simplified exponential expression, we need to solve the equation. The given equation is "8 divided by 4 equals 8 divided by 15."
To solve this equation, we can cross-multiply. We multiply the numerator of the left side with the denominator of the right side, and vice versa.
Cross-multiplying gives us:
8 x 15 = 4 x 8
Now, we simplify each side:
120 = 32
Since 120 does not equal 32, we can conclude that there is no missing number in this expression.