Aaliyah's Tea Shop has caffeinated tea and decaffeinated tea. The tea shop served 50 teas in all, 10 of which were caffeinated. What percentage of the teas were caffeinated?

This is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 5 terms.