Problem:
A mixture of liters of paint is red tint, yellow tint and water. Five liters of yellow tint are added to the original mixture. What is the percent of yellow tint in the new mixture?
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Solution:
There are liters of yellow tint in the original -liter mixture. After adding liters of yellow tint, of the liters of the new mixture are yellow tint. The percent of yellow tint in the new mixture is or .
Answer: .
The problems on this page are the property of the MAA's American Mathematics Competitions