What is one way to compare fractions with unlike denominador

What is the y-intercept of the line given by the equation

3women sell hats at a craft fair weekly. the money they make at the fair is split into categories. 9% goes to pay taxes. $55 goes to pay rent for the space they sell in. the rest is split between the women. if the group make $706 at the fair, how much does each women get paid once the money is divided

If a line is defined by the equation y = 5x + 2, what is the slope?