four photographers are taking pictures at a school dance. Photographer A takes 25 of the pictures, Photographer B takes 4% , Photographer C takes 0.29 hey , and Photographer D takes 27/100 . Which choice lists the photographers in order from least to greatest by the amount of pictures they take?

Let
x----------> number total of pictures

we know that
A------>25
B------> 4%----> 4/100------> 0.04x
C-----> 0.29------> 29%-------------------> 0.29x
D------> 27/100 --------> 27%--------------> 0.27x

[B+C+D]=4%+29%+27%--------> 60%
that means 
A=100%-60%---------> 40%
so
A-------------> 0.40x

A------>0.40 x
B------> 0.04x
C-----> 0.29x
D------> 0.27x

the answer is
the photographers list in order from least to greatest by the amount of pictures they take is
B------> 0.04x
D------> 0.27x
C------> 0.29x
A------> 0.40x