When dividing a fraction by a fraction you follow these steps:
ORIGINAL PROBLEM: 3/4 ÷ 4/5 = FLIP and CHANGE OPERATOR: 3/4 * 5/4 = MULTIPLY: 3/4 * 5/4 = 15/16
ORIGINAL PROBLEM: 5/6 ÷ 6/7 = FLIP and CHANGE OPERATOR: 5/6 * 7/6 = REDUCE (if possible): 5/6 * 7/6 = MULTIPLY: 5/6 * 7/6 = 35/36
Now you get to try a few for yourself.