A student earned s points on a quiz. For the semester, quizzes count for $20\%$ of the grade, and the student wants to calculate the quiz contribution to the semester grade as a percentage: "twenty percent of the quiz total, $s$." Which algebraic expression represents that contribution?

• A. $1.20s$
• B. $\frac{s}{0.20}$
• C. $0.20s$
• D. $20+s$

Answer: (C)