Answer: the fraction of the day is 1/4
Explanation:
Charlotte spent 1/2 of the day shopping at the mall.
she also spent 1/4 of the time trying on jeans. The whole day is assumed to be 1. The fraction of the day that Charlotte spends on trying jeans is the ratio of the time she spends on trying jeans to the whole day. It becomes
(1/4)/1 = 1/4
So the fraction of the day the Charlotte spend in trying jeans is 1/4