21/7 to a mixed number

The fraction 21/7 as a mixed number is 3

Divide the numerator (21) by the denominator (7): the quotient 3 is the whole part and the remainder 0 is the numerator of the fractional part, over the same denominator. Reduced to lowest terms that gives 3.

Multiply the whole part by the denominator and add the remainder back: 3 × 7 = 21, and 21 + 0 = 21 — exactly the numerator you started with.

21 ÷ 7 = 3.