Well, if you know it grinds 2/7lbs of spices in 1/3 of a second, you
need to find how many lbs it can grind in 1 second. You can do this by
multiplying both sides by 3:
27=13
27×3=67
13×3=1
Therefore,
67=1
The machine grinds 6/7 lbs of spices per second.
Hope this helped!
