Question

the strength of a school is 1800 . If 55% of the students are girls, then how many ys are there in the school?

Answer 1

number of boys in the school = 1800 × 45/ 100
= 810

Answer 2

x/1800*100=45
x*100=45*1800
x=45*1800/100
x=45*18
x=810
therefore there 810 boys in the school