We have
A=7632m^2
the formula of the area of a rectangle
[tex]A=l\times w[/tex]where l is the length and w is the width
in our case we have
l=99m
then we substitute the values given in the formula
[tex]7632=99\times w[/tex]we need to isolate the w in order to find the value of the width
[tex]\frac{99}{99}\times w=\frac{7632}{99}[/tex][tex]w=\frac{7632}{99}=77.09m[/tex]the width is 77.09m