First, you find the total of both sides.
42 + 67 = 109
Next, you divide the Total by either of the sides, but since we're looking for the percentage of males, it'd be better to do this.
42/109 = 0.39
Multiply it by 100 to change it into percentage form.
0.39 x 100 = 39%
There your answer is 39%
