9 would be the first number and 7 would be the second.
60%
You divide 3/5 and then you get a decimal 0.6. Then you convert it to a percentage
For two line segments to be parallel, their slopes must be equal.
Therefore slope of AB must be equal to slope of CD
which is, option 3
<span> (y4-y3)/(x4-x3)=(y2-y1)/(x2-x1)</span>