Answer:
$151,000
Step-by-step explanation:
To find the maximum amount that Simon can borrow, we have to calculate the 80% of the market value of the house and subtract from that amount the remaining mortgage balance that he has:
Market value of the house: $420,000
Remaining mortgage balance: $185,000
$420,000*80%= $336,000
$336,000-$185,000= $151,000
The maximum amount that Simon can currently borrow against his home is $151,000.