The correct answer for the question that is being presented above is this one: :"<span>18/83." </span><span>First we need to know the total number of customers, so we should add 54+42+153, which equals 249. </span><span>Now we know that last week, 54 out of 249 total customers paid with cash. </span><span>As a fraction, 54/249 reduces to 18/83. </span>