Answer:
64 ivy stems
Explanation:
There's 72 ivy stems for 18 centerpieces meaning 4 stems per 1 centerpiece.
to answer multiply by 16:
1:4 x 16 = 16 centerpieces and 64 stems
Ratio of ivy stems to centerpieces:
72/18 = 4 ivy stems per centerpiece
Therefore,
16 x 4 = 64
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