A ratio can be expressed as an equivalent ratio by multiplying or dividing each side of the ratio by the same number.
Examples:
The ratio 4:5 is the same as 8:10 or 12:15
The ratio 3:6 is the same as the ratio 1:2
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it is just like doing proportion. you set up the fractions, do their cross products, and then divide them by the number that is with the variable.
Example: Willie runs 5 miles in 45 minutes. If Willie runs at the same rate, how far can he run in 72 minutes?
5 mi. X mi.
------ = ------
45 min. 72 min.
45 x X= 45X (cross out the 45) 72 x 5= 360 (divide 360 by 45)
------ ------
45 45
And then, when you finish these steps, your answer is: X= 8 mi.
I think you're rather confused. It takes two numbers to make a ratio, also known as a fraction. The first or top number is called the numerator and the second or botton number is called the denominator. A ratio's value is equal to the numerator divided by the denominator, and you need two numbers to divide. However, any number divided by one is that number, so the ratio of x/1 could maybe be called "the ratio of x", though that's a poor way of saying it.
The ratio of the number of trees in the orchard is 2:3:6. If there are 36 trees in the orchard, What is the large number of trees?