Percent atom economy: calculate it, or find a formula weight from it

1. A.
   30%
2. B.
   35%
3. C.
   50%
4. D.
   75%

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1. A.
   70.1%
2. B.
   77.7%
3. C.
   90.5%
4. D.
   95.0%

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1. A.
   137 u
2. B.
   274 u
3. C.
   167 u
4. D.
   254 u

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1. A.
   $25\%$
2. B.
   $50\%$
3. C.
   $65\%$
4. D.
   $75\%$

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1. A.
   $25.25\%$
2. B.
   $38.17\%$
3. C.
   $50.25\%$
4. D.
   $64.17\%$

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1. A.
   $65\%$
2. B.
   $70\%$
3. C.
   $40\%$
4. D.
   $50\%$

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