A babysitter charges 25% more than her normal hourly rate on Saturday night. Her normal hourly rate is $12.50.


Which expression represents how much the babysitter charges on Saturday night?


A.

$12.50 x 5/4


B.

$12.50 x 7/4


C.

$12.50 x 1/4


D.

$12.50 x 3/4