Final answer:
John must produce an additional $8,850 as a down payment.
Step-by-step explanation:
In this scenario, the bank gave John a 90% loan on a house valued at $88,500. This means the bank is willing to finance 90% of the house's value. To calculate how much additional cash John needs to produce as a down payment, we subtract the loan amount from the house's value.
Loan amount = 90% of $88,500 = $79,650
Down payment = House value - Loan amount
Down payment = $88,500 - $79,650 = $8,850
John needs to produce an additional $8,850 as a down payment.