How do you compute a ratio?

Answer 1

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.

Answer 2

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

Answer 3

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.

Answer 4

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?

Answer 5

(original- after price)/original x 100