In a mixture of milk and water, the proportion of milk by weight was 80%. If, in a 210-gram mixture, 40 grams of pure milk is added, what would be the percentage of milk in the resulting mixture? Pick:
A) 82.2%	B) 83.2%	C) 84.2%	D) 85.2%	E) 86.2%
The amount of milk is 0.8(210) + 40 = 208 grams.   The proportion is 208/250= 
<gadget id="calculator">208/250</gadget>
<output>104/125 = around 0.832</output>
0.832 which is 83.2%   The answer is 83.2%.
<result>B</result>
In a mixture of milk and water, the proportion of milk by weight was 80%. If, in a 210-gram mixture, 40 grams of pure milk is added, what would be the percentage of milk in the resulting mixture?