Question 987116
<pre>
Rule of ratios to fractions:

The ratio of A:B means 

1. the fraction corresponding to A is {{{A/(A+B)}}}
2. the fraction corresponding to B is {{{B/(A+B)}}}

So the fraction of girls is {{{3/(2+3)}}}{{{""=""}}}{{{3/5}}}

Multiply 1100 × {{{3/5}}} = 660 girls 


Edwin</pre>