1 dozen = 12
Owen baked 8 dozen cookies.
To find out the total number of cookies Owen baked, multiply 12 (cookies in 1 dozen) with 8 (number of dozen cookies Owen baked)
12 (cookies in 1 dozen) x 8 (dozens) = 96 total cookies
Since Owen left 1/4 at home, he brought 3/4 to school.
Divide the total number of cookies with 4 to get how many cookies are in 1/4.
96 (total cookies) ÷ 4 = 24 cookies in 1/4
Now, we know Owen left 24 cookies at home.
Subtract the total number of cookies with the number of cookies Owen left at home to find out the total amount of cookies Owen took to school (which is 3/4)
96 (total cookies) - 24 (1/4 cookies - at home) = 72 cookies (3/4 - brought to school)
Owen brought to school 72 cookies.