Answer:
Eric's family is driving to Los Angeles and the total distance to be covered is 250 miles
initially they travel 123.7 miles and then they stop for lunch
then again started their journey and drove 64.4 mile and then stop for gas
so the remaining distance to Los Angeles will be
= 250 - ( 123.7+64.4)
=250 - 188.1
= 61.9miles
The hidden question that needs be answered before reaching to the final answer is 'What is total distance they have travelled till reaching to gas station?'