John bought some pens at the prices shown below.
(a) He bought an equal number of blue and red pens. He paid $99.20 more for the blue pens than the red pens. How many pens did he buy altogether?
(b) Yenni spent an equal amount of money on the blue and red pens. What fraction of the pens she bought were red pens? Express your answer in the simplest form.
