Answer:
$225
Explanation:
The cost of the new sofa is $900.
Mackenzie need to raise 75% of the cost price.
Her brother will lend her the balance, which is equivalent to 75% of the cost price.
Mackenzie needs to raise
= 75% of 900
=75/100 x 900
=$675
Her brother will lend her
= $900 - $675
=$225