-12-15

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

-12⋅55-15

To write -15 as a fraction with a common denominator, multiply by 22.

-12⋅55-15⋅22

Multiply 12 and 55.

-52⋅5-15⋅22

Multiply 2 by 5.

-510-15⋅22

Multiply 15 and 22.

-510-25⋅2

Multiply 5 by 2.

-510-210

-510-210

Combine the numerators over the common denominator.

-5-210

Subtract 2 from -5.

-710

Move the negative in front of the fraction.

-710

The result can be shown in multiple forms.

Exact Form:

-710

Decimal Form:

-0.7

Evaluate -1/2-1/5