Answer :
If 8 is about 25% or 1/4 of the total cost of their meal, that means that the total cost was 4 times the cost of the tip.
Put it into proportions-
8:25
x:100
Since you have to multiply 25 by 4 to get to 100 you need to multiply 8 by 4 to get to x.
8 times 4 is 32, which is also the value of x.
The total cost would be $32.
Put it into proportions-
8:25
x:100
Since you have to multiply 25 by 4 to get to 100 you need to multiply 8 by 4 to get to x.
8 times 4 is 32, which is also the value of x.
The total cost would be $32.