A company pays their employees $20 per hour. Using fractional notation, write a proportion that represents how long an employee must work to make $80. Use x to represent the unknown number of hours....

$\frac{x}{1} = \frac{80}{20}$

Simplifying the proportion:

$x = \frac{80}{20}$

$x = 4$

Therefore, an employee must work 4 hours to make $80.