9514 1404 393
Answer:
 49 ÷ 7 = 7
Explanation:
We assume your intended quotients are ...
 49 ÷ 7 = 7
 4.9 ÷ 7 = 0.7
 0.49 ÷ 0.7 = 0.7
 0.049 ÷ 0.07 = 0.7
The one that is different is 49 ÷ 7.
__
Evaluation of the quotients tells you which is different. Inspection of place values also tells you which is different. In all but the first quotient, the 4 and the 7 are in the same number place, so the quotients will be the same value.