Answer:
The amount of money donated by each friend is $16
Step-by-step explanation:
The given parameters are;
The percentage of the money raised that is kept with the local chapter = 80%
The percentage of the money raised that goes to the national chapter = 20%
The amount of money donated by each of the four friends = Equal amount each
The total amount of the money raised for the local chapter of the non-profit = $51.20
Let x represent the amount of money donated by each of the four friends
Therefore, we have;
80% of 4 × x = 51.20, which gives;
80/100 × 4 × x = 51.20
0.8 × 4 × x = 51.20
x = 51.20/(0.8 × 4) = 16
The amount of money donated by each friend = x = $16.