Find closest multiple of $16$ to $25$. We see that $1 \times 16 = 16$ is the nearest. Now subtract $16$ from $25$ to get reminder $9$. Add $1$ to quotient.
Find closest multiple of $16$ to $90$. We see that $5 \times 16 = 80$ is the nearest. Now subtract $80$ from $90$ to get reminder $10$. Add $5$ to quotient.
Since $10$ is less than $16$, stop the division. The reminder is $10$. The topmost line $015$ is the quotient. Remove all zeros at the start of the quotient to get the actual quotient $15$.