I used a calculator and got <span>4.3649984e+14</span>
The answer is correct but i do not know what ARLENE did wrong
So, this is a proportion problem. If we express 75% as a fraction (3/4ths), we have:

Since he won all of his games, we add the number won (x), to the number previously won and divide it by the total games played which is just the previous games played plus the number of current games played, so since he lost no games we still add x to the denominator as well. Solving this gives us:

That x value is 20.
To find the width, divide the area by the length.
Width = 375 / 25
Width = 15 feet.