688 divided by 31 Think central

Acommunity group sells 2,000 tickets for its raffle. the grand prize is a car. neil and 9 of his friends buy 10 tickets each. when the winning ticket number is announced, it is found to belong to neil's group. given this information, what is the probability that the ticket belongs to neil? a.1/5 b.1/10 c.1/200 d.1/4

The interior angles formed by the side of a hexagon have measures of them up to 720° what is the measure of angle a

I’m still confused on how to work the percentages