### Instruction: Simplify the fraction $\frac{16}{20}$.### Response: To simplify a fraction, I want to divide both the numerator and the denominator by their greatest common factor (GCF).
The GCF of 16 and 20 is 4, since 4 is the largest positive integer that divides both 16 and 20 evenly.
So I can simplify the fraction by dividing both 16 and 20 by 4.
That gives me $\frac{16}{20} = \frac{16 \div 4}{20 \div 4} = \frac{4}{5}$.