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.