The sports ground has an area of 420 m2 and occupies 7% of the school site. What is the area of the school site?

Let us denote by S the area of the entire school site, expressed in m ^ 2.

In the initial data for this task, it is reported that the area of the sports ground of this school site is forty two dozen m ^ 2 and this site occupies seven percent of the entire school site, therefore, we can draw up the following equation:

(7/100) * S = 420,

solving which, we get:

(7/100) * S / 7 = 420/7;

(1/100) * S = 60;

(1/100) * S * 100 = 60 * 100;

S = 6000 m ^ 2.

Answer: the required area is 6000 m ^ 2.