Question

$90 is divided into three parts in the ratio 2:3:7. Find the largest share.

Answer 1

630/12..................or 52.5

Answer 2

let the 3 parts be 2x 3x and 7x 
90$=2x+3x+7x
      =12x
therefore x = 90/12=7.5
hence the largest share is 7x that is equal to 7.5*7 i.e. 52.5$