(-3)/(-5) represents a [[1]] rational number

A rational number is a number that can be expressed as the ratio of two integers, such as a/b where a and b are integers and b is not equal to zero. 

A positive rational number has its numerator and denominator either both positive or negative that is greater than zero.

$\frac{-3}{-5}$$= \frac{3}{5}$

So, $\frac{-3}{-5}$ represents a positive rational number.