Question

o valor de 9/7 - 7/9

Answer 1

MMC de 7 e 9 = 63

$\frac{81}{63} - \frac{49}{63} = \frac{32}{63}$ 

Espero ter ajudado!

Answer 2

9[tex] \frac{9}{7} - \frac{7}{9} = \frac{(9x9)-(7x7)}{63} = \frac{81-49}{63} = \frac{32}{63} = 0,507937