Question

determinati fractiile echivalente cu 9 supra 13 , avand numitorul:52,91,169,143.

Answer 1

 $\frac{^{4)}9}{13}=\frac{4*9}{4*13}=36 \,/ \,52\;;\\ \frac{^{7)}9}{13}=63 \,/\, 91\;;\\ \frac{^{13)}9}{13}=117 \,/\, 169\;;\\ \frac{^{11)}9}{13}=99\,/\,143\;;$