10/20 as a decimal
Understand the Problem
The question is asking to convert the fraction 10/20 into its decimal form. This can be done by dividing the numerator (10) by the denominator (20).
Answer
The decimal form of the fraction $\frac{10}{20}$ is $0.5$.
Answer for screen readers
The decimal form of the fraction $\frac{10}{20}$ is $0.5$.
Steps to Solve

Set Up the Division Now we'll set up the division of the numerator by the denominator. Here, we'll divide 10 by 20.

Perform the Division To convert the fraction into a decimal, we calculate: $$ 10 \div 20 $$ This can also be understood as how many times 20 goes into 10.

Calculate the Result When you perform the division, you find: $$ 10 \div 20 = 0.5 $$ So the decimal form of the fraction is 0.5.
The decimal form of the fraction $\frac{10}{20}$ is $0.5$.
More Information
Converting fractions to decimals is a common mathematical operation. In this case, simplifying the fraction $\frac{10}{20}$ first would yield $\frac{1}{2}$, which is another way to see that it equals $0.5$.
Tips
 Forgetting to simplify the fraction first could lead to more complicated calculations.
 Not performing the division correctly can also result in an incorrect decimal.