A lot has 2 white, 6 red and 4 yellow cars. What is the ratio of yellow to white cars in simplest form?

1. Yellow cars are 4 and white cars are 2, so the ratio is 4:2. 2. Divide both parts by 2 to get 2:1. 3. 1:2 reverses the order, 4:6 compares yellow to red, and 3:1 compares red to white. _Source: Wikipedia, Fraction, section Ratios_