<PRE><B>Question 17672</B>
2 1/2 dozen muffins would be 24 + 6 or 30 muffins with 600 g of flour.
Let x = number of muffins made with 900 g of flour.


Set up a ratio with muffins divided by flour:
{{{(30 muffins)/(600 g) = (x muffins)/(900 g) }}}


Remember that {{{a/b=c/d}}} means that {{{a*c=b*d}}}


In the same way, cross-multiply 
{{{(30 muffins)/(600 g) = (x muffins)/(900 g) }}}  to obtain: 

{{{30*900 = 600*x}}}
{{{27000=600x}}}


Divide by 600:
{{{x= 27000/600 = 270/6 = 45}}} muffins.


HOWEVER, the EASY way to do this, in this particular case, is to notice that you are comparing 600 g of flour with 900 g of flour.  This is half again as much as 600 g., so you can make half again as many muffins.  Half of 30 is 15, so add 30+15= 45 muffins.  Much easier, right???


R^2 at SCC</PRE>