Menu
A ratio is an ordered pair of numbers a and b, written a / b where b does not equal 0.
A proportion is an equation in which two ratios are set equal to each other.
For example, if there is 1 boy and 3 girls you could write the ratio as:
Watch a Khan Academy Video » Length: 14:13
Watch a Khan Academy Video »
Length: 10:25
Watch a Khan Academy Video »
Length: 2:28
Watch a Khan Academy Video »
Length: 5:48