A local entrepreneur began a dog sitting business. His kennel has a capacity of 100 dogs. The highest number of dogs kept in his kennel at one time was 84. At that time there were 20 Black Labradors, 16 Golden Retrievers, 18 Labradoodles, 7 Chihuahuas, 8 German Shepherds and the rest were all mixed breeds. What percentage of the dogs were mixed breeds?