Answer:
$300
Explanation:
His father is paying 3/5 of the debt John owes. John owes $500.
To find what his father will pay, multiply 3/5 and 500
3/5*500
3/5*500/1
Multiply across the numerator and denominator
(3*500)/(5*1)
1500/5
300
So, his father will pay $300