Subtract as indicated, and express your answer in lowest terms. $\frac { 5 } { 8 } - \frac { 4 } { 5 }$
A) $\frac { 7 } { 40 }$
B) $\frac { 1 } { 5 }$
C) $- \frac { 7 } { 40 }$
D) $- \frac { 7 } { 41 }$
E) $- \frac { 8 } { 41 }$

Question

Quizplus · Accepted Answer

To subtract fractions, they must have a common denominator. The least common denominator (LCD) of 8 and 5 is 40. Convert each fraction: $\frac{5}{8} = \frac{25}{40}$ and $\frac{4}{5} = \frac{32}{40}$. Subtracting gives $\frac{25}{40} - \frac{32}{40} = -\frac{7}{40}$.

Subtract as Indicated, and Express Your Answer in Lowest Terms 58−45\frac { 5 } { 8 } - \frac { 4 } { 5 }85​−54​

Subtract as Indicated, and Express Your Answer in Lowest Terms $\frac { 5 } { 8 } - \frac { 4 } { 5 }$