A 'table set' consists of a 'table' and a 'table cloth'. For every 'table set', the price of its 'table cloth' is directly proportional to the price of the 'table'. The 'table cloths' of two 'table sets' A and B are exchanged. The ratio of the prices of the 'table set' A and 'table set' B before and after the exchange of the 'table cloths' are $5$:$1$ and $4$:$1$ respectively. If the price of 'table set' C is $8$ times that of 'table set' D$,$ then the ratio of the prices of 'table set' C and 'table set' D when their respective 'table cloths' are exchanged is $($A 'table set' is identified by the"table', and not by the 'table cloth'$)$