16. A chalk box is 5/6 th full of its capacity. 5 chalks were taken out by a teacher and 2 chalks were put inside it by a student. If it is 4/5th full now, how many chalks the box
contained when it was full?
(a) 90
(b) 80
(c) 72
(d) can't be determined

8.5

explanation:

it was really good but i wish there would be more humor.

if you break down the data from the global footprint network, china exerts far more pressure on its ecosystems per capita than america in terms of crops, grazing, foresting, and fishing. but where america blows everybody out of the water is carbon emissions per capita