hours = 5; minutes = 15; converted = convert_time(hours,minutes); disp(converted) % Instead of writing function from scratch, you should first implement the % functionality, as in the code below. minutes_in_hour = 60; mnt = minutes/minutes_in_hour; total = hours + mnt; % Then, you can pack it in the function. function total = convert_time(hours,minutes) minutes_in_hour = 60; mnt = minutes/minutes_in_hour; total = hours + mnt; end