A. 4/13 3/10
find a common denominator which is 130
mult. by 10/10 and the second one by 13/13
40/130 and 39/130
so, that means 4/13 is larger because after you find a common denominator, compare the top numbers to find the larger and 40 is larger than 39.
B. a rational number between them would be 39.5/130