Which of the following, Option 1 or Option 2, is a proportion?
Option 1: 5/6=15/18
Option 2: 5/6=20/18
Option 1: 5/6=15/18 is a proportion.
In a proportion, both sides of the equation are equal, meaning that the fraction on the left side of the equal sign is equal to the fraction on the right side of the equal sign.