Question

if boys % is 55% and no of girls are 900 hundreds than how many boys wil be there in the school

Answer 1

no. of girls in school =900. then girls%age is 45%
%age of boys is =55%,let the no.of total students be x
45%of x = 900
45/100 ×x= 900
x=900×100/45
x=20×100
x=2000
then no. of boys =2000-900 =1100
hence the no. of boys in school =1100

Answer 2

Let total no of students=x
no. of girls=900
percentage of boys=55%
therefore, percentage of girls=100%-55% =45%
total no of students=
45%of x= 900
45/100 of x = 900
9/20 of x = 900
x= 900*20/9
x= 100*20
x= 2000
therefore total no of boys=
55%of 2000
55/100 of 2000
11/20 of 2000
=1100