Answer:
Sam has 21 dollars
the ratio is 12:21
Step-by-step explanation:
Original Ratio = 4:7
Difference of numbers = 9
Take the first number = 4x
Then the other = 7x
gives us: 7x-4x=9
Now we find a factor of 9: 3x=9
x=9/3
x = 3
Therefore the 1st number = 4x = 4(3)= 12
2nd number = 7x = 7(3)=21
Proof: 21-12=9
