Question 195083
If  we  treat  this  as  a  proportion  problem
.
 (428 days / yr ) / 1 yr  =  ( 107  days / yr ) / Z,,,, where  z  is  corresponding  years  on  W
.
cross  multiply  and  simplify
.
428 *z  = 107
.
z = 107 / 428  = 1/4  yr
.
checking
ratio  of  days  per  year  is  107/428  =  1/4
ratio  of  years  = 1/4 ,,,,,,,  ok