Question 471165
  <pre><font face = "Tohoma" size = 4 color = "indigo"><b> 
Hi,
In a school having 990 students 12 out of 27 are girls.
Let x represent the total amount of girls in the class
 {{{12/27 = x/990}}}  |Cross Multiplying to solve
     x = 12*990/27
     x = 440, the number of girls.  550 boys  (990-440)

CHECKING our Answer***
 12/27 = 4/9 = 440/990 = 44/99 = 4/9