the f*ck are you talking about, it’s simple reduction
I can’t belive there adults that can’t pass second grade math

If you need I can draw it for you like you do it in kindergarten

0.7% can be written as 0.7/100 or 7/1 000 and you can then do one of following:

(0.7/100)100 000 = 0.7(100 000/100) = 700
or
(7/1 000)100 000 = 7(100 000/1 000) = 700