Answer :

luana
[tex]120\ minutes\ in\ 2\ hours\\\\ x\ minutes\ \ in\ \ 15\ hours\\\\\Making\ ratio:\\ 120-2\\x-15\\\\Cross\ multiplication\\\\ 120*15=2x\\\\1800=2x\ \ \ \ | divide\ by\ x\\\\ x=900\\\\900\ minutes\ in\ 15\ hours.[/tex]
The operation is multiplication . Just do 60 times 15 . You will get 900