Respuesta :

First work out the parenthesis.  Division goes first so 0.12/0.3 = 0.4. 0.8-0.4-0.4. (Sorry for so many dots o_o) 4.92 divided by 0.4 equals 12.3
0.12/0.3=0.4
0.8-0.4=0.4
4.92/0.4=12.3