The percent of increase in Ellies reading is 88 %
Solution:
Given that,
During summer vacation, Ellie read 50 pages per night
Once she returned to school, she read 94 pages per night
To find: Percent of increase in Ellies reading
The percent increase is given by formula:

Here,
final value = 94 and initial value = 50
Substituting the values in above formula, we get

Thus percent of increase in Ellies reading is 88 %