A seagull was flying about sea level looking to catch a fish below sea level. The elevation above sea level was 125 1/2 feet. He
spots a fish that is 45 1/2 feet below sea level. The seagull stops exactly half way between his location above sea level and the fish’s location below sea level because he realizes he won’t catch it in time. What’s the seagull’s position in feet at the halfway point? Show work.
The easiest way to do this would be to imagine that Jolie has 100 marbles. If Mary has 40% fewer, that means she has 60 marbles. Then if they combine all their marbles into a single bag, they will have 160 marbles, of which 100 are Jolie's. So the % that is Jolie's is 100/160 = 0.625 = 62.5%.