Problema Solution
When five new girls join the club, the percent of girls increased from 40% to 50%. What is the number of boys in the club?
Answer provided by our tutors
let 'x' represent the number of girls in the club before the new girls joined
(50 - 40)x/100 = 5
0.1x = 5 divide both sides by 0.1
x = 5/0.1
x = 50
now we know that 50 + 5 = 55 girls are 50% members of the club. the rest of the 50% are 55 boys.