<h2>
Hello!</h2>
The answer is:
The simplified fraction is:

<h2>Why?</h2>
To solve this problem we must remember the following:
- Addition or subtraction of fractions, we add or subtract fractions by the following way:

- Product of fractions, the multiplication of fraction is linear, meaning that we should multiply the numerator by the numerator and denominator by denominator, so:

- Convert mixed number to fraction,

So, solving we have:


Hence, the simplified fraction is:

Have a nice day!
Answer is 36.
20 * 80/100 = 16
20+16=36
Answer:
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Step-by-step explanation:
The three interior angles of any triangle add to 180 degress. Therefore,
180-(120 + 40) = the third angle.
So, 20 is the third angle