In a high school the number of girls makes up 20% of all the students. How many girls are there if there are 800 boys in the school ?

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- Oct 28th 2009, 01:59 PMsri340percent word problem
In a high school the number of girls makes up 20% of all the students. How many girls are there if there are 800 boys in the school ?

- Oct 28th 2009, 02:10 PMpickslides
20% girls implies 80% boys therefore

Making x the total number of students

$\displaystyle 80\% \times x = 800$

$\displaystyle 0.8 \times x = 800$

Gives x = 1000, how many are girls?