Simplify: 0.9(3÷2.25− 1/8 (1 2/3 + 1/9 ))− 4/7 ÷0.8
0.9*(3/2.25- 1/8* (1+ 2/3 + 1/9 ))- 4/7 /0.8 = 0.2857142857142857
...or 2/7 if you look at the web2.0calc display