Question

Jen has eight dollars and Heather has 3/5 of the bill.How much did heather pay

Answer 1

Let
Total Bill = $x

Given
Jen paid = $8
Heather paid = x(3/5)=$3x/5

Total Bill=Jen Paid + Heather Paid
x=8+3x/5
Multiply by 5 both sides
5x=40+3x

5x-3x=40
2x=40
2x/2=40/2
x=20

3/5 of 20 = (3/5)(20)= 3*4 = 12
Bill was for $20 Jen paid $8 and remaining $12 paid by Heather.

Answer 2

3/5 is equal to 60%
so if 40% is 8 dollars then heather pays 12 and the total is 20