12-0.2
To write -0.2 as a fraction with a common denominator, multiply by 22.
12-0.2⋅22
Combine -0.2 and 22.
12+-0.2⋅22
Combine the numerators over the common denominator.
1-0.2⋅22
1-0.2⋅22
Multiply -0.2 by 2.
1-0.42
Subtract 0.4 from 1.
0.62
0.62
Divide 0.6 by 2.
0.3
Evaluate 1/2-0.2