Which of the following is a rational number 25 6/0 the square root of 61 or 0.37815

The rational number among the options given is 0.37815.

A rational number is any number that can be expressed as a fraction, where the numerator and denominator are both integers.

Out of the options provided, 25 is a rational number because it can be expressed as the fraction 25/1.

6/0 is not a rational number because division by zero is undefined.

The square root of 61 is not a rational number because it cannot be expressed as a fraction.

0.37815 is a rational number because it can be expressed as the fraction 37815/100000.