What decimal is between 0.6 and 0.7?

Oh, dude, that's an easy one. So, like, a decimal between 0.6 and 0.7 would be 0.65. It's right smack dab in the middle, like the Goldilocks of decimals - not too big, not too small, just right. So, yeah, 0.65 is your go-to decimal for that range.