2/4 of the candy bars at the store and there where 12 candy bars, how many would she buy

If you mean 'she' wants to buy 2/4 of the candy bars at the store and there are 12 candy bars in the store then:
2/4 is the same as 1/2
Half of 12? 6
She would buy 6 candy bars.

Where m is the slope of the line and b is the y-intercept of the line, or the y-coordinate of the point at which the line crosses the y-axis. to write an equation in slope-intercept form, given a graph of that equation, pick two points on the line and use them to find the slope. this is the value of m in the equation.

How much is 32 out of 40 written as a percentage? convert fraction (ratio) 32 / 40 answer:   80%