Correct. Regroup and divide: $\displaystyle{\left(\frac{{1.5}}{{5}}\right)}{\left(\frac{{{10}}^{{8}}}{{{10}}^{{4}}}\right)}={\left({0.3}\right)}{\left(\frac{{{10}}^{{8}}}{{{10}}^{{4}}}\right)}\usepackage{cmbright}\Huge\$

Use the quotient rule: $\displaystyle{\left({0.3}\right)}\times{{10}}^{{{8}-{4}}}={0.3}\times{{10}}^{{4}}\usepackage{cmbright}\Huge\$

Convert 0.3 into scientific notation, regroup, and use the product rule: $\displaystyle{3}\times{\left({{10}}^{{-{{1}}}}\times{{10}}^{{4}}\right)}={3}\times{{10}}^{{-{1}+{4}}}={3}\times{{10}}^{{3}}\usepackage{cmbright}\Huge\$