12-25

To write 12 as a fraction with a common denominator, multiply by 55.

12⋅55-25

To write -25 as a fraction with a common denominator, multiply by 22.

12⋅55-25⋅22

Multiply 12 and 55.

52⋅5-25⋅22

Multiply 2 by 5.

510-25⋅22

Multiply 25 and 22.

510-2⋅25⋅2

Multiply 5 by 2.

510-2⋅210

510-2⋅210

Combine the numerators over the common denominator.

5-2⋅210

Multiply -2 by 2.

5-410

Subtract 4 from 5.

110

110

The result can be shown in multiple forms.

Exact Form:

110

Decimal Form:

0.1

Subtract 1/2-2/5