Answer:
11/14
Explanation:
change the 1 1/7 numerator into an improper fraction as 8/7
the common denominator of 7 and 4 is 28 for the numerator
this would leave you with 32/28-21/28
change the denominator 2 1/2 to 5/2
5/2 x 1/5 you multiply top and bottom to get 5/10=1/2
this would leave you with 11/28 / 1/2
when you divide fractions you change the divide to multiply by the reciprocal
11/28 x 2/1 = 22/28
22/28 = 11/14