Question

Jacob and Caden share a reward of $108 in a ratio 7:2. How much does Jacob get?

Answer 1

Ratio of 7:2 means a total of 9 parts 
the whole is $108
Jacob gets 7/9 * $108 = $84

Answer 2

1.  : 0.286
 
3.5 : 1.
 
hope this helps