First, we need to find what part of the total number of guppies the [tex]\frac{1}{4}[/tex] blue guppies represent.
[tex]1-\frac{1}{4}=\frac{3}{4}[/tex]
Then, we multiply that value by the fraction of the tank the guppies occupy.
[tex]\frac{2}{5} *\frac{3}{4} =\frac{6}{20}=\frac{3}{10}[/tex]
Your answer is [tex]\frac{3}{10}[/tex].
