Question

O resultado da operação abaixo é OPERAÇÃO:9/7 - 7/9
A) 0
B) 2/63
C) 1
D) 32/63

Answer 1

$\Large\boxed{\begin{array}{l}\sf\dfrac{9}{7}-\dfrac{7}{9}=\dfrac{9\cdot9-7\cdot7}{7\cdot9}=\dfrac{81-49}{63}\\\\\red{\sf\dfrac{32}{63}}\green{\checkmark}\\\huge\boxed{\boxed{\boxed{\boxed{\sf\maltese~alternativa~D}}}}\end{array}}$