16100 people at a concert 2/5 of the audience are boys, 3/7 of the audience are girls, How many girls are there?
What fraction of the people are adults?

Question

16100 people at a concert 2/5 of the audience are boys, 3/7 of the audience are girls, How many girls are there? 
What fraction of the people are adults?

luffingsails · Answer

Hi Jake,

So, the total number of people is given by:

Number of Boys + Number of Girls + Number of Adults = 16100.

We know:

(2/5)*16100 = Number of Boys
(3/7)*16100 = Number of Girls

So, we can place those into the equation.

(2/5)*16100 + (3/7)*16100 + Number of Adults = 16100

Now just solve for Number of adults and you are done. Help enough?

anonymous · Answer

Yes thats great but how many girls are there?

luffingsails · Answer

The Number of girls is given by (3/7)*16100.

luffingsails · Answer

Sorry. So, for the fraction of adults...

Just do:

1 - (2/5)-(3/7) = Fraction of adults.

anonymous · Answer

rightthanks!:)

luffingsails · Answer

Cool. Sorry for the earlier stuff. I'll read the question better next time. <laugh>

anonymous · Answer

no problem:)