In a mixture of milk and water, the proportion of milk by weight was 90%. If, in a 120-gram mixture, 30 grams of pure milk is added, what would be the percentage of milk in the resulting mixture? Choose the correct option
A) 91.4%  B) 91.6%  C) 91.8%  D) 92.0%  E) 92.2%
The amount of milk is 0.9(120) + 30 = 138 grams.   The proportion is 138/150= 
<gadget id="calculator">138/150</gadget>
<output>23/25 = around 0.92</output>
0.92 which is 92%   The answer is 92.0%.
<result>D</result>
In a mixture of milk and water, the proportion of milk by weight was 90%. If, in a 120-gram mixture, 30 grams of pure milk is added, what would be the percentage of milk in the resulting mixture?