non-defining relative vs dangling participle

Hello, Paydaypanda, and welcome to the Grammar Exchange.

@Paydaypanda posted:

"In 2017, more than eight in ten U.S. adults got news on a mobile device, up  each recorded year from 2013."

I'd like to know where you have taken this sentence from. Please read our Guideline (5) here.

"Up" and "down" are usually followed by a prepositional phrase with "from" to indicate that the figure mentioned in the preceding clause increased or dropped compared with the time reference that follows. In that case, "up from ..." and "down from ..." function as reduced sentential relatives:

- In 2017, more than eight in/out of ten U.S. adults got news on a mobile device, up from seven in/out of ten in 2013. (which meant an increase compared with the amount reported in 2013)

- In 2013, more than six in/out of ten U.S. adults got news on a mobile device, down from eight in/out of ten in 2017. (which meant a reduction compared with the amount reported in 2017)

I find the sentence you provided dubious. I think that the author wanted to say that the number of U.S. adults getting the news on a mobile device was higher than the one reported every single year since 2013. As the author used "from" to mark the starting point of the period being compared, he/she forgot the other "from":

- In 2017, more than eight in ten U.S. adults got news on a mobile device, up from each recorded year (starting) from 2013.

Another possibility is that the author wanted to say that the number of U.S. adults getting the news on a mobile device had been increasing every year from 2013 to 2017, in which case an absolute clause should have been used:

- In 2017, more than eight in ten U.S. adults got news on a mobile device, each recorded year from 2013 up from the previous one.

Dear Gustavo. Unfortunately I couldn't locate the source origin, but I will look up more and update as soon as I find it.

Thank you for your warm welcome and help on my question.

paydaypanda.