Question

Bill’s recipe for onion soup calls for 4.0 lb of thinly sliced onions. If an onion has an average mass of 115 g how many onions does he need?

Answer 1

A lb is equal to 453.59g.
Firstly let’s convert lb to g:
4*453.59=1814.369 g

Now let’s divide the result by the mass of the onions:
1814.369/115≈15.78 onions.

So it’s 16 onions, since we can’t buy half an onion.