Answer:
a.
15
b. 14

Explanation:
Given: Buying price of two ticket =
90
Face value of each ticket =
52.5
∴ Face value of two ticket is

=
105
Now, to find markdown:
Markdown = Face value - Buying value
∴ Markdown =

=
15 is the markdown.
b. To find the percent markdown:

= 14.28 %
∴ Markdown percent is rounded to nearest whole number 14%