Question: Text-messaging users sent or received an average of 41.5 messages per day in 2011 and sent or received an average of 29.7 messages per day

Text-messaging users sent or received an average of 41.5 messages per day in 2011 and sent or received an average of 29.7 messages per day in 2009. Find the unit ratio of the number of messages sent or received per day in 2011 to the number of messages sent or received per day in 2009. What does your result mean?

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