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?

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Answer 1 · 2018-06-05T05:47:21

2:3

#2/5# of the photographs are black and white.

That means:

#1- 2/5 = (5-2)/5 = 3/5 # of photographs are colored.

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

#2/5 : 3/5#

#=> 2 : 3#

Answer 2 · 2018-06-05T06:21:33

#2 : 3#

The total number of photographs can be regarded as #5/5#.

Note that #2/5 +3/5 = 5/5#

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

Therefore the ratio is #2:3#