In a mixture of milk and water, the proportion of milk by weight was 70%. If, in a 200-gram mixture, 40 grams of pure milk is added, what would be the percentage of milk in the resulting mixture?  Choose the correct choice from the following options
A) 71%
B) 72%
C) 73%
D) 74%
E) 75%
The amount of milk is 0.7(200) + 40 = 180 grams.   The proportion is 180/240= 
<gadget id="calculator">180/240</gadget>
<output>3/4 = around 0.75</output>
0.75 which is 75%   The answer is 75%.
<result>E</result>
In a mixture of milk and water, the proportion of milk by weight was 70%. If, in a 200-gram mixture, 40 grams of pure milk is added, what would be the percentage of milk in the resulting mixture?