In a mixture of milk and water, the proportion of milk by weight was 70%. If, in a 150-gram mixture, 50 grams of pure milk is added, what would be the percentage of milk in the resulting mixture?	Choose the correct choice from the following: A) 75.5% B) 76.5% C) 77.5% D) 78.5% E) 79.5%
The amount of milk is 0.7(150) + 50 = 155 grams.   The proportion is 155/200= 
<gadget id="calculator">155/200</gadget>
<output>31/40 = around 0.775</output>
0.775 which is 77.5%   The answer is 77.5%.
<result>C</result>
In a mixture of milk and water, the proportion of milk by weight was 70%. If, in a 150-gram mixture, 50 grams of pure milk is added, what would be the percentage of milk in the resulting mixture?