In a bread recipe, the ratio of water to flour is 13 to 20. There is 168 g more flour than water. How much flour does the recipe call for?  Choose the correct choice from the following options.
A) 400 g
B) 440 g
C) 480 g
D) 510 g
E) 525 g
Let x equal the amount of water, and y equal the amount of flour.   We know that x = 13/20y.   We also know that x = y-168.   So we can simplify:   y-168 = 13/20y   So to isolate y, we get:   7/20y = 168   And to solve for y:   y = 480   Answer: 480 g
<result>C</result>
In a bread recipe, the ratio of water to flour is 13 to 20. There is 168 g more flour than water. How much flour does the recipe call for?