### Still have math questions?

A construction worker is building a wall. The wall is $$15.5$$ yd long. He needs to place a stud every $$18$$ in. The first stud has already been placed at one end of the wall. How many additional studs are needed, if the last stud will be placed at the other end of the wall? First fill in the blanks on the left side of the equation using three of the ratios shown. Then write your answer on the right side of the equation.
$$\frac{1\text{ stud}}{18\text{ in}}$$