lost progress

Below the percentage circle, it should say some words that will most likely help you. If it does not show you these words, I have enclosed a screenshot from mine that shows what it will most likely look like. If you keep on working, you will eventually get to 100% most likely, but will probably have to check back every so often, to do one or two things that they added. Hopefully, they won’t be too hard. Also, for some reason, someone down voted your valid question. I fixed it, so it is now the standard 0 votes, instead of -1.

Best regards,

        Panzerkampfwagen

You lost some progress because new Math skills were added on July 31st. Details are here:
https://khanacademy.zendesk.com/hc/en-us/articles/115007408888-New-exercises-coming-to-missions-July-2017

I was on 97 progress but took me back to 63