Subtract.
-$- \frac { 7 } { 8 } - \frac { 4 } { 5 }$
A) $- \frac { 67 } { 13 }$
B) $- \frac { 11 } { 13 }$
C) $- \frac { 67 } { 40 }$
D) $\frac { 3 } { 40 }$

Question

Quizplus · Accepted Answer

To subtract fractions with unlike denominators, we first need to find a common denominator. In this case, the least common multiple of 8 and 5 is 40.

$- \frac { 7 } { 8 } - \frac { 4 } { 5 } = -\frac{35}{40} -\frac{32}{40} = -\frac{67}{40} $

Therefore, the best choice is C as it is the only one that equals our result.

Subtract - −78−45- \frac { 7 } { 8 } - \frac { 4 } { 5 }−87​−54​

Subtract
- $- \frac { 7 } { 8 } - \frac { 4 } { 5 }$