At a harvest, 16 ears of corn are being picked every 18 peppers. if 9 peppers have been picked, out many ears of corn have been picked?

8 ears of corn have been picked.
We know :
16 : 18
and
X : 9
Divide 16 by 2 ( because 18 / 2 = 9)
16 / 2 = 8
8 : 9

If i think this is what your asking, he should look at the grams or pounds/ounces and compare the to their cost then max can identify which one is proportional and which is not ( i think xd)