Because the fuel efficiency of the compact car is #1 7/12# more than the SUV there is a ratio of #1 7/12:1#. Since we already know the fuel efficiency of the SUV we have to multiply the mileage by a factor to ensure that #1# will equal #1 7/12#. As the ratio is #x:1# the number to multiply 16 by is just #1 7/12#.