Replacement value of the home = $275000
Percentage of Insurance required = 85%
The amount of coverage is 85% of the replacement value of the home. Therefore, the coverage amount would be:
Coverage amount = $275,000 x 85%
= $275,000 x 0.85
= $$233,750
Therefore, they need to have an insurance cover of $233,750 to cover the 85 percent replacement value of the current home.