From what I've seen on line, I think Sanders has a higher percentage of the pledged delegates than percent of the popular vote.
Regardless of the actual breakdown, he's still running second in a one-person race. He needs to keep campaigning in order to prevent Clinton from swinging to the center until after all the left-wing positions she's discovered that she's always supported this week are written into the Democratic platform at the convention and it's more difficult for her to forget about how passionate and commited to them she is, but his campaign needs to be recognizing that she's the nominee and proceed in a way that doesn't undercut her so that the Democratic party has as strong a showing as possible, so the down ticket races go their way as well and they can actually get some of the stuff he cares about implemented instead of obstructionism causing nothing to happen for another four years.