Subtract as indicated, and express your answer in lowest terms. $\frac { 5 } { 8 } - \frac { 8 } { 9 }$
A) $- \frac { 19 } { 73 }$
B) $\frac { 19 } { 72 }$
C) $\frac { 5 } { 18 }$
D) $- \frac { 20 } { 73 }$
E) $- \frac { 19 } { 72 }$

Question

Quizplus · Accepted Answer

To subtract fractions, you need a common denominator, which in this case is $8 \times 9 = 72$. Convert each fraction: $\frac{5}{8} = \frac{5 \times 9}{72} = \frac{45}{72}$ and $\frac{8}{9} = \frac{8 \times 8}{72} = \frac{64}{72}$. Subtracting these gives $\frac{45}{72} - \frac{64}{72} = -\frac{19}{72}$.

Subtract as Indicated, and Express Your Answer in Lowest Terms 58−89\frac { 5 } { 8 } - \frac { 8 } { 9 }85​−98​

Subtract as Indicated, and Express Your Answer in Lowest Terms $\frac { 5 } { 8 } - \frac { 8 } { 9 }$