Answer :
[tex]\sf \frac{14}{21}^{(7}= \frac{14:7}{21:7}=\boxed{\sf \frac{2}{3}} [/tex]
[tex] \frac{14}{21} = [/tex] Divide both numerator and denominator by the GCF 7. Which is equal to [tex] \frac{2}{3} [/tex]