The graduating class at Ashland High School was 280 students a generation ago. This year's
graduating class is 336 students. What is the percent of
increase in the size of the graduating class?

$250 deductible means jane must pay the first $250 of her bill. so the insurance company paid = (80% of bill) - deductible = (0.8 x $2550) - $250 = $2040 - $250 = $1790 and jane's cost is = (bill) - (insurance payment) = $2550 - $1790 = $760