Let the entire forest area = x
A % can always be found by dividing by 100
15/100 * x = 235 Multiply by 100
15x = 235 Divide by 15
x = 235 / 15
x = 1566.7
The forest is 1566.7 acres which is about 2 sections. A section is about 640 acres. If you live in the country it is about 1 mile by 1 mile of land.