Answer: To determine which size frame will be in the center, we need to order the frame sizes from smallest to largest.
9 1/6 < 9 1/8 < 9 1/3 < 9.15 < 9.25
So the smallest frame will be 9 1/6 inch wide. So the frame with size 9 1/6 inch will be in the center.
Explanation: