Your answer is 16.8%.
To walk it through, we’ll need to find out how much money Fred owes in total by adding the $12 he owes to his mom and the $9 he owes to his brother.
12 + 9 = 21
We can write our current numbers as a fraction representing the amount of money he owes / the amount of money he has in total.
21/125
From there, we’ll divide to find the decimal.
21/125 = .0168
And lastly, we’ll convert our decimal to a percentage!
16.8%
Therefore, Fred owes 16.8% of his money.
Hope this helps!
:)