Aparking lot had 80 cars. of those 80 cars, 35% were blue, 16 were black, and the rest were tan. what percent of the cars were tan

The snowstorm lasted a total of 9hours it snowed at a rate of 1 inch per hour during the first 2 hours the snow continued for the next 6 hours falling at a rate of 2 inches per hour, and finally reduced to 1 inch per hour for the last hour