Evaluate the Fraction Expression: (20-5)/(7+3)

Let's write the exercise in a different form:

$(20-5):(7+3)=$

According to the order of operations in arithmetic, we'll first solve the expressions in parentheses:

$20-5=15$

$7+3=10$

Now we'll get the exercise:

$15:10=$

Let's write the exercise as a fraction:

$\frac{15}{10}$

Let's reduce the numerator and denominator by 10:

$\frac{1.5}{1}=1.5=1\frac{1}{2}$