((2/3)²+(-6.3/8))+6.375

Question

((2/3)²+(-6.3/8))+6.375

Answer 1

(4/9-0.7875)+6375/1000
(4/9-7875/10000)+51/8
(4/9-63/80)+51/8
(320-567)/720+51/8
-247/720+51/8
(-247+4590)/720
4343/720
6* 23/720