# Chloe swam 40 laps in the pool, but this was only 50% of her total swimming workout. How many more laps does she still have to do?

Jun 27, 2017

$40$

#### Explanation:

What we know:

$40$ laps equals half her workout.

What we would like to know:

How many more laps she has to swim, we will call this $x$.
She has done $40$ laps out of $x$ amount this can be written as a fraction $\frac{40}{x}$. We are told that this is only half her workout, to find out the remaining laps we set up a proportion.

$\frac{40}{x} = \frac{1}{2}$

Cross multiply:

$x = 80$

Now that we know the total amount of laps we can subtract this from the amount she has already completed.

$80 - 40 = 40$

She has $40$ more laps to complete her workout.

Jun 27, 2017

She still has another $40$ laps of the pool to do.

#### Explanation:

50% is the same as $\frac{1}{2}$

If she has completed 50% of her workout $\left(\frac{1}{2}\right)$, then there is the same amount still left to do, (The other 50%)

This means she still has another $40$ laps of the pool to do.