[tex] \frac{111}{700} \div ( \frac{1}{7} + \frac{1}{70} + \frac{1}{700} )[/tex]
[tex] = \frac{111}{700} \div ( \frac{100}{700} + \frac{10}{700} + \frac{1}{700} )[/tex]
[tex] = \frac{111}{700} \div \frac{100 + 10 + 1}{700} [/tex]
[tex] = \frac{111}{700} \div \frac{111}{700} [/tex]
[tex] = 1[/tex]