Answer:
b
Step-by-step explanation:
you should use mathaway, it's really useful
First work out the parenthesis. Division goes first so 0.12/0.3 = 0.4. 0.8-0.4-0.4. (Sorry for so many dots o_o) 4.92 divided by 0.4 equals 12.3
So basically you just want to find the LCM of the denominators shown, or 2 and 3.
So in this case, you could use the most inefficient method, or listing the multiples out:
2 : 2, 4, 6
3: 3, 6, 9
And as you can see, the first multiple that matches is 6. So your answer would be B, 6.