SOLUTION: if 1 cup of milk is added to a 3-cup mixture that is 2/5 flour and 3/5 milk, what percent of the 4 cup mixture is milk? answers:80, 75, 70, 65, 60 thanks a lot

Algebra ->  Conversion and Units of Measurement -> SOLUTION: if 1 cup of milk is added to a 3-cup mixture that is 2/5 flour and 3/5 milk, what percent of the 4 cup mixture is milk? answers:80, 75, 70, 65, 60 thanks a lot      Log On


   

Question 468947: if 1 cup of milk is added to a 3-cup mixture that is 2/5 flour and 3/5 milk, what percent of the 4 cup mixture is milk? answers:80, 75, 70, 65, 60
thanks a lot
Answer by kingme18(98) About Me  (Show Source):
You can put this solution on YOUR website!
If our original 3-cup mixture is 3/5 milk, that means that there are +%283%2F5%29%2A3=1.8 cups of milk. Once we add 1 cup of milk, we'll have 2.8 cups of milk in the 4 cup mixture. To turn that into a percent, we'll first divide what we're talking about by the total: +2.8%2F4=0.7+ Multiply that decimal by 100, and you get 70%.