rearranging equation algebraically: I COULD NOT DO IT any help

Question

as shown in the image below there is an equation that I want to rearrange it so that the R₁ in the denominator is removed from the denominator without changing the ratio on the right side H₂(s)/H₁(s). in Other Words I want the denominator to be [1+ something s] and it's fine if the numerator got to be changed.

Answer 1

just divide the right side top & bottom by R1 to get

R2/R1 all over R2A2s + 1

then the numerator on the right side is R2/R1 and

the denominator on the right side is 1+ R2A2s

H2(s) = R2/R1

H1(s) 1+R2A2s