Make sure to set up the proportion correctly. This is the solution to $\displaystyle\frac{{42}}{{n}}=\frac{{5}}{{6}}\usepackage{cmbright}\Huge\$ , rounded to the nearest integer. Each ratio should compare things in the same order, such as free throws made to attempts. The correct proportion would have been $\displaystyle\frac{{n}}{{42}}=\frac{{5}}{{6}}\usepackage{cmbright}\Huge\$ .