Simplify 8.57-4.6632-1.7+0.863-0.123.
Addition and subtraction of decimals
8.57-4.6632-1.7+0.863-0.123=8.57+0.863-(4.6632+1.7+0.123)
=9.433-6.4862
=2.9468
Hence, the value is 2.9468
Express 0.1¯23 as a rational number in simplest form.