To determine what effect the salespeople had on purchases, a department store polled 700 shoppers as to whether or not they had made a purchase and...

To determine what effect the salespeople had on purchases, a department store polled 700 shoppers as to whether or not they had made a purchase and whether or not they were pleased with the service. Of those who had made a purchase, 125 were happy with the service and 111 were not. Of those who had made no purchase, 148 were happy with the service and 316 were not.Find the probability that a shopper who was happy with the service had made a purchase (round the answer to the nearest hundredth).