# How do i strikethrough just one part of a fraction? [duplicate]

I want to make it clear that 2 factors cancel out to simplify the equation for example.

I've tried using \st like this

$k(x+h)=$\st{$\frac{(x+h)^2}{(x+h)+1}$


but that just strikes through the center and i cant seem to compile with st inside of the 

• Just use the cancel package and say \cancel{...} for the expressions you wish to strike out. \documentclass[fleqn]{article} \usepackage{amsmath} \usepackage{cancel} \begin{document} \begin{align*} \frac{x^2-5x+6}{-x+2} & =\frac{(x-2)(x-3)}{-(x-2)} \\ &=\frac{\cancel{(x-2)}(x-3)}{-\cancel{(x-2)}}\\ &=-x+3 \end{align*} \end{document} modulo typos. – Schrödinger's cat Sep 11 '19 at 20:49