Hi , so 31/9 equals to 28/9 and 7 equals to 7/1 , when we divided we have to flip the second fraction which is 3 1/9 [28/9] so now we have 9/28 divided by 7/1 , but we are actually multiplying the two fractions , so 9 times 7 = 63 , 1 times 28 = 28 , 63/28 the we have to simplified , the answer is 9/4.