[Return ÷ Investment] as a ratio ;i.e The Ratio is Return : Investmen[(Return1÷ Investment1 ) = (Return2÷ Investment2)]R1 = N 25000R2 =?I1 = N450,000,I1 = N 700000(25000 ÷ 450000) = (R2 ÷ 700000)R2 = [(25000 × 700000 ) ÷ 450000]= N38,888.90K∴ The return on a investment of Y = N38888.90K