Answer:
Percentage of new group boys = 30%
Percentage decrease for the boys = 10%
Increase percent of the girls = 10%
Explanation:
Given:
Number of children = 15
Ratio (Boys to Girls) = 2 : 3
Number of more girls join = 5
Find:
Percentage of boys in new group
Percentage decrease for the boys
Increase percent of the girls
Computation:
Number of boys = 15[2/5]
Number of boys = 6
Number of girls = 15[3/5]
Number of girls = 9
Percentage of boys = [6 / 15]100
Percentage of boys = 40%
Percentage of girls = [9 / 15]100
Percentage of girls = 60%
New number of students = 15 + 5
New number of students = 20
New number of boys = 6
New number of girls = 9 + 5 = 14
Percentage of new group boys = [6 / 20]100
Percentage of new group boys = 30%
Percentage of new group girls = [14 / 20]100
Percentage of new group girls = 70%
Percentage decrease for the boys = 40% - 30%
Percentage decrease for the boys = 10%
Increase percent of the girls = 70% - 60%
Increase percent of the girls = 10%