Jessica has fifteen dolls. Four-fifths of time dolls have brown hair. How many of her dolls don't have brown hair?

1 Answer
Apr 13, 2018

3

Explanation:

There are several methods one could use. I will provide one.
#4/5# is equal to #20%#. #20# goes into #100# five times.
#100/20=5#
Determine, then, what #4/5# of #15# is by determining what number goes into #15# five times.
#15/5 = 3#
#3# goes into #15# five times.
#5/5# of #15 = 15#
#4/5# of #15 = 12# because #4*3 = 12#
#15-12 = 3#
So, #4/5#, or #3#, of the dolls do not have brown hair.