0.25 is a rational number that is equal to one quarter; it is the multiplicative inverse of 4. It is an irreducible fraction with 1 as the numerator and 4 as the denominator.

In mathematics

Multiplying a number by one quarter is equal to dividing it by 4. For example, 24×0.25=6. Dividing a number by one quarter is the same as multiplying it by 4. For example, 5÷0.25=20.