108 is what percent of 72

One side of a rectangle is 7 feet shorter than seven times the other side. find the length of the shorter side if we also know that the perimeter of the rectangle is 306 feet.

Hi, can anyone show me how to do this problem? 100 points for this. in advance

1yd 1 ft = 1 1/12 1 1/3 1 1/2 1 1/6