C)90 because if it go all the way around it would be 180 and I don't see that
You pretty much just flip the second fraction and factor
(2/3)(1/4)=
2/12=
1/6
multiply the numerators by the numerators, (top numbers)
and the denominators by the denominators, (bottom numbers)
The tree's grow rate is 1.1 per month
7.48/6.8
=1.1