# Two-fifths of photographs are black and white. The rest of the photographs are color. What is the ratio of black and white to color photographs?

Jun 5, 2018

2:3

#### Explanation:

$\frac{2}{5}$ of the photographs are black and white.

That means:

$1 - \frac{2}{5} = \frac{5 - 2}{5} = \frac{3}{5}$ of photographs are colored.

The ratio of black and white to colored photographs will be:

$\frac{2}{5} : \frac{3}{5}$

$\implies 2 : 3$

Jun 5, 2018

$2 : 3$

#### Explanation:

The total number of photographs can be regarded as $\frac{5}{5}$.

Note that $\frac{2}{5} + \frac{3}{5} = \frac{5}{5}$

So, for every $2$ black and white photos there are $3$ colour photos.

Therefore the ratio is $2 : 3$