Write down your ratio. This is typically expressed as two numbers with a colon in the middle. For example, if you have five hot dogs and six hamburgers, the ratio of hot dogs to hamburgers is 5:6.
Divide the first number by the second, using either a calculator or pencil and paper. In our example, divide the first number (5) by the second number (6).
Write down your answer. In our example, the answer is 0.83333333333 because that is the result of dividing 5 by 6. Feel free to round off the number as needed.