Is 7.76 irrational or rational

Rational , because it can be converted to a fraction.

7.76 = 7 76/100 = 7 38/50 = 7 19/25

NB Irrational Numbers cannot be converted tpo a quotient.

'pi = 3.1415936.... ' it the most famous irrational number.

When you are given pi = 3.14' in school , this is only an approximation.