SOLUTION: Mariah, the fabulous chef, prepared 20 quarts of soup. Mariah was horrified to find out that she made a mistake in the recipe and the soup that she prepared is only 10% chick

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Question 878483: Mariah, the fabulous chef, prepared 20 quarts of
soup. Mariah was horrified to find out that she
made a mistake in the recipe and the soup that she
prepared is only 10% chicken stock. Mariah needs
to make the soup with 20% chicken stock. How
much chicken stock should she add to the original
soup?
Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
We can expect the percents are volume per volume.

Let v = how many quarts of chicken stock to add.
Assume the chicken stock by itself is 100%.

Some excess amount of soup will need be accepted.
highlight_green%28%2820%2A10%2Bv%2A100%29%2F%28v%2B20%29=20%29
Solve for v.