Tap the blue circles to see an explanation.
$$ \begin{aligned}\frac{1}{4-111}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}\frac{1}{-107} \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-\frac{1}{107}\end{aligned} $$ | |
① | Simplify numerator and denominator |
② | Place minus sign in front of the fraction. |