# Mac has 25 marbles, of which 20% are red. Thayer has 20 marbles, of which 75% are not red. What is the absolute difference between the numbers of red marbles they have?

Nov 11, 2016

$0$

#### Explanation:

Mac has 20% of 25 red marbles
$\textcolor{w h i t e}{\text{XXX}} = \frac{20}{100} \times 25 = 5$ red marbles.

Thayer has 20 marbles of which 75% are not red
$\rightarrow$ 25% of Thayer's 20 marbles are red.
$\textcolor{w h i t e}{\text{XXX}} = \frac{25}{100} \times 20 = 5$ red marbles.

Therefore each of them has $5$ red marbles
and the (absolute) difference between the number of red marbles they have is zero.