一个俱乐部里男生比女生多 80 人。10% 的男生去参加了夏令营，俱乐部里剩下的人数变成了 1402 人。俱乐部里有多少名女生？

1. Express the number of remaining boys and girls in terms of a variable

Let the number of girls be $x$.
The number of boys is $x + 80$.
Since $10\%$ of the boys went for a camp, the remaining percentage of boys is $100\% - 10\% = 90\%$.
Number of remaining boys = $0.9(x + 80) = 0.9x + 72$.
The number of girls remains $x$.

2. Form an equation for the total remaining pupils and solve for $x$

Total remaining pupils = Girls + Remaining boys
$x + 0.9x + 72 = 1402$
$1.9x + 72 = 1402$
$1.9x = 1402 - 72$
$1.9x = 1330$
$x = \frac{1330}{1.9} = 700$