72 degrees is used in a pie chart to represent 4 people . how many people were there altogether ?

First lets find out the unit rate, the percent per person. Lets do it:-

72 ÷ 4 = 18 
18% per person.

Lets find out how many people in the pie chart:-

100 ÷ 18 = 5.555

So, there are about 6 people in the pie chart together.

Hope I helped ya!! xD