Pete painted 4/8 of a rectangle green. he painted 1/8 of the same rectangle blue. pete painted the rest of the rectangle red. what fraction of the rectangle did pete paint red

Can someone check if i did this correct. it’s number 4 if you’re wondering.

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?