SOLUTION: the proportion of black paint to pink paint is 2:7. how much black paint is used if 21 liters of pink paint is used?

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Question 769098: the proportion of black paint to pink paint is 2:7. how much black paint is used if 21 liters of pink paint is used?
Answer by Cromlix(4381) About Me  (Show Source):
You can put this solution on YOUR website!
Black paint to Pink paint
2:7
21 litres of pink paint
21/7 = 3
So, 3*2 = 6 litres of black paint.
Hope this helps.
:-)