1. The problem asks to express 80% as a fraction in simplest form. 2. Recall that percent means "per hundred," so 80% can be written as the fraction $\frac{80}{100}$. 3. Simplify the fraction by dividing numerator and denominator by their greatest common divisor (GCD). 4. The GCD of 80 and 100 is 20. 5. Divide numerator and denominator by 20: $$\frac{80 \div 20}{100 \div 20} = \frac{4}{5}$$ 6. Therefore, 80% in simplest fraction form is $\frac{4}{5}$.