elementary school
posted by Sara .
what do I do when there is an equation like 15/4 divided by 9/1 how do I do that since 9 cant go into 15 evenly

( 15 / 4 ) / ( 9 / 1 ) =
15 * 1 / ( 4 * 9 ) =
15 / 36 = 3 * 5 / ( 3 * 12 ) = 5 / 12
15 / 4 divided by 9 / 1 = 5 / 12 
Remember this:
division is the reciprocal of multiplication, "IS" means equal, or the same.
15/4 divided by 9/1 equals 15/4*1/9
= 15/36 and that can be reduced
=3*5/3*12=5/12
a/b divided by c/d= a/b * d/c =ad/cb