How do you change 54 over 21 in a mixed number?

Answer 1

To convert any improper fraction to a mixed number:

1. Divide the numerator (top number) by the denominator (bottom number) to get a whole number and a remainder
2. Write the whole number with the remainder as the numerator over the original denominator.

For 54/21 this becomes:

54 ÷ 21 = 2 r 12

⇒ 54/21 = 212/21

Fractions are usually stated in the simplest terms (that is no common factor between the numerator and denominator), so if your 54/21 had been the result of say an addition of fractions, it should be simplified:

• either before conversion to a mixed number:

54 and 21 have a common factor of 3:

54/21 = 18/7

= 24/7

• or after conversion:

12 and 21 have a common factor of 3:

54/21 = 212/21

= 24/7