Perform the indicated operation. Express your answer in simplest form.
-$\frac { 7 } { 10 } + \frac { 8 } { 9 }$
A) $\frac { 1 } { 6 }$
B) $\frac { 143 } { 90 }$
C) $\frac { 15 } { 19 }$
D) $\frac { 143 } { 19 }$

Question

Quizplus · Accepted Answer

To add fractions, you need a common denominator. The least common multiple of 10 and 9 is 90. Convert each fraction: $\frac{7}{10} = \frac{63}{90}$ and $\frac{8}{9} = \frac{80}{90}$. Adding these gives $\frac{143}{90}$.

Perform the Indicated Operation 710+89\frac { 7 } { 10 } + \frac { 8 } { 9 }107​+98​

Perform the Indicated Operation $\frac { 7 } { 10 } + \frac { 8 } { 9 }$