10/20 as a Decimal

To convert a fraction to a decimal, divide the numerator by the denominator:

10 ÷ 20 = 0.5

Since 20 only has prime factors of 2 and/or 5, the result is a terminating decimal — it ends after a finite number of digits.

Note: 10/20 = 1/2. The simplified form gives the same decimal value.