Subtract.
-$$- \frac { 3 } { 8 } - \frac { 2 } { 5 }$$
A) $- \frac { 5 } { 13 }$
B) $- \frac { 31 } { 13 }$
C) $- \frac { 31 } { 40 }$
D) $- \frac { 1 } { 40 }$

Question

Quizplus · Accepted Answer

To subtract fractions with different denominators, first find a common denominator, which in this case is 40 (the least common multiple of 8 and 5). Convert each fraction: $-\frac{3}{8} = -\frac{3*5}{8*5} = -\frac{15}{40}$ and $-\frac{2}{5} = -\frac{2*8}{5*8} = -\frac{16}{40}$. Then, subtract: $-\frac{15}{40} - \frac{16}{40} = -\frac{31}{40}$.

Subtract - −38−25- \frac { 3 } { 8 } - \frac { 2 } { 5 }−83​−52​

Subtract
- $- \frac { 3 } { 8 } - \frac { 2 } { 5 }$