(30:27-1\3)*2 2\7+2\5
(30/27-1/3)*2*2/7+2/5=(10/9-1/3)*2*2/7+2/5=10-3/9*2*2/7+2/5=7/9*2*2/7+2/5=1/9*2*2+2/5=4/9+5/2=20+18/45=38/45=~0,84