This isn't a terrible score, but you can do better. You may want to brush up on the basics and consider installing a browser extension like Grammarly to help you with your online communications.
MID-HIGH (56%-75%)
Not too bad! I know this isn't your best effort, though. Take a little extra time to re-read any written communication before you press send. When in doubt, Google it!
HIGH (76%-100%)
Awesome job! You are definitely a grammar nerd. The best of us still need refreshers every now and then. I suggest keeping a style book at your desk to reference when you're unsure of a word. Of course, Google is always a great resource. Keep up the great work!