5/9, 9/9, 15/9, 15/9, 24/9. hope this helped.
A. 20% because you paid $21 out of $105 so 21/105 =.2 and to make it a percent you move the decimal over to places, making it 20%
A regular polygon is a polygon that has angles with all the same degree and the side length of the line segments the polygon is made of has all the same length.
