Samantha and her friends are going on a road trip that is 245 7/50 miles long. they have already driven 128 53/100. how much farther do they have to drive?

They have to drive 116 61/100 miles

Step-by-step explanation:

Road trip is 245 7/50 miles long

They have already driven 128 53/100

Those are mixed fraction. To facilitate the calculation, we should transform them into improper fractions (numerator > denominator)

245 7/50 = (50*245+7)/50 = 12257/50

128 53/100 = 12853/100

To find out much farther they have to drive, we need to subtract how much they have already driven to the total lenght of the trip:

12257 - 12853 = 24514 - 12853 = 11661

 50         100             100                100

They still have 11661/100 to drive. In mixed fraction:

116 61/100 miles