Question

помогите!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

$\frac{18a^{7} }{20b^{5} }*\frac{10b^{2} }{27a^{4} } =\frac{2a^{3}*1 }{2b^{3} *3} =\frac{a^{3} }{3b^{3} }$