Find closest multiple of $15$ to $75$. We see that $5 \times 15 = 75$ is the nearest. Now subtract $75$ from $75$ to get reminder $0$. Add $5$ to quotient.
Since $0$ is less than $15$, stop the division. The reminder is $0$. The topmost line $05$ is the quotient. Remove all zeros at the start of the quotient to get the actual quotient $5$.