You may have divided 330 by 30. You need to set up a proportion and solve for the unknown number of SUVs. The correct proportion of SUVs to cars is $\displaystyle\frac{{{3}\ \text{ SUVs}}}{{{10}\ \text{ cars}}}=\frac{{{n}\ \text{ SUVs}}}{{{330}\ \text{ cars}}}\usepackage{cmbright}\Huge\$ . The answer is 99 SUVs.