Explanation:
1 min 4 cals
60 cals how many mins?
1min. 60cals
____. × _______ = 15 mins
4cals. ?mins
we simplify the matter by simplifying 60 with 4 and striking out cals... then we will have 15 on the top right and then we multiply 1 and 15 together at the end we add the mark of the answer which is (min).