Answer:
He still owes $105
Step-by-step explanation:
First, we have to find how much money Marco had paid back.
We are going to find the percentage of the number:
[tex]\frac{150 * 30}{100} = 45[/tex]
Then, doing a simple mathematical subtraction we can find how much money he still owes to his brother:
[tex]150 - 45 = 105[/tex]
