81/4 to a mixed number

The fraction 81/4 as a mixed number is 20 1/4

Divide the numerator (81) by the denominator (4): the quotient 20 is the whole part and the remainder 1 is the numerator of the fractional part, over the same denominator. Reduced to lowest terms that gives 20 1/4.

Multiply the whole part by the denominator and add the remainder back: 20 × 4 = 80, and 80 + 1 = 81 — exactly the numerator you started with.

81 ÷ 4 = 20.25.