Iwill mark anyone who gets the answer right and has an explanation pls .circle graph shows the type of condiments people used on their hamburgers. what percentage of people used relish? a.80% b.8% c.20% d.25%

Suppose that sahil knows that 45 people with ages of 18 to 29 voted. without using a calculator, he quickly says then 135 people with ages of 30to 49 voted. is he correct? how might sohil have come up with his answer so quickly?