Answer:35
Step-by-step explanation: First we convert the percent into a decimal. It's very simple all we have to do is move the decimal point 2 spaces forward.
So in this case 87.5% would equal .875 in decimal form.
Next we mulitply the decimal times the whole number, 40.
0.875*40 = 35
And we have our answer.
35 students live less than 10 miles from the school.
Hope this helps have a good one!