There are 72 boys and 54 girls in Grade Five. Find the ratio of boys to girls in its simplest form.

There are 72 boys and 54 girls, so ratio should be 72:54.

Then, find its simplest form:

72:54 = (72 ÷ 6) : (54 ÷ 6) = 12:9 = (12 ÷ 3) : (9 ÷ 3) = 4:3