Answer:
-
[tex] \frac{7}{8} [/tex]
Step-by-step explanation:
concert the mixed number to an improper fraction
[tex] \frac{21}{4} \div ( - 6)[/tex]
dividing a positive and negative equals a negative: (+)÷(-)= (-)
[tex] - \frac{21}{4} \div 6[/tex]
reduce the number with the gretest common factor 3
[tex] - \frac{7}{4 } \times \frac{1}{2} [/tex]
multiply the fraction
[tex] - \frac{7}{8} [/tex]
