Too much 7 versus too much 8

$\dfrac{\underbrace{77777.....7777}_{\text{7 repeated 2018 times}}}{\underbrace{88888.....8888}_{\text{8 repeated 2018 times}}}$ $=\dfrac{\underbrace{11111.....1111}_{\text{1 repeated 2018 times}}\times 7}{\underbrace{11111.....1111}_{\text{1 repeated 2018 times}}\times 8}$ $=\dfrac{7}{8}$ $=\boxed{0.875}$

$\dfrac{\underbrace{77777.....7777}_{\text{7 repeated 2018 times}}}{\underbrace{88888.....8888}_{\text{8 repeated 2018 times}}}$

$\text{7 and 8}$ both have same repeated

we can write this like below

$\frac{7}{8}$ = $\boxed{0.875}$

$\frac{77}{88}$ = $\boxed{0.875}$

$\frac{777}{888}$ = $\boxed{0.875}$

$\frac{7777}{8888}$ = $\boxed{0.875}$

$\dfrac{\underbrace{77777.....7777}_{\text{7 repeated 2018 times}}}{\underbrace{88888.....8888}_{\text{8 repeated 2018 times}}}$ = $\boxed{0.875}$