115 square, l15 over 11, and 10.5624 in order from least to greatest

Item 22 there were n signers of the declaration of independence. the youngest was edward rutledge, who was x years old. the oldest was benjamin franklin, who was y years old. x is 25% of 104, 7 is 10% of y, and n is 80% of y. y is what percent of (n+y? x)?