It would be 21/16
Explanation:
7/12 divide 4/9
To divide by a fraction, multiply by the reciprocal of that fraction
7/12 multiply 9/4
To multiply the fractions, multiply the numerators and denominators separately
7 x 9 / 12 x 4
Reduce the fraction with
7 x 3 / 4 x 4
Multiply the numbers
21/4 x 4
Answer : 21/16