Answer: 16/45.
Step-by-step explanation: To solve for the unknown value represented by "?", we can use algebraic manipulation.
First, we can simplify the left-hand side of the equation by dividing the numerator and denominator by 3:
? / (3/4) = 4/15
? / (3/4) ÷ 3/4 = (4/15) ÷ 3/4
? = (4/15) × (4/3)
Next, we can simplify the right-hand side of the equation by multiplying the numerator and denominator by 5:
? = (4/15) × (4/3) = 16/45
Therefore, the value of "?" is 16/45.