



 
Hi, There is a word which is understood but missing in the second sentence. I should say
If it said
then you would multiply $3 \frac37$ buy $2$ to get the weight of the second box. If it said
then you would multiply $3 \frac37$ buy $3$ to get the weight of the second box. If it said
then you would multiply $3 \frac37$ buy $2 \frac12 = \frac52$ to get the weight of the second box. Analogously if the second box weighs $1 \frac56$ times as much you need to multiply $3 \frac37$ buy by $1 \frac56$ to obtain the weight of the second box. Can you complete the problem now? Penny
 


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