79-319

A mixed number is an addition of its whole and fractional parts.

79-(3+19)

Add 3 and 19.

To write 3 as a fraction with a common denominator, multiply by 99.

79-(3⋅99+19)

Combine 3 and 99.

79-(3⋅99+19)

Combine the numerators over the common denominator.

79-3⋅9+19

Simplify the numerator.

Multiply 3 by 9.

79-27+19

Add 27 and 1.

79-289

79-289

79-289

79-289

Combine the numerators over the common denominator.

7-289

Subtract 28 from 7.

-219

Cancel the common factor of -21 and 9.

Factor 3 out of -21.

3(-7)9

Cancel the common factors.

Factor 3 out of 9.

3⋅-73⋅3

Cancel the common factor.

3⋅-73⋅3

Rewrite the expression.

-73

-73

-73

Move the negative in front of the fraction.

-73

-73

Factor 7/9-3 1/9