Q. How do I enter fractions and then cross out the number in MSWord?

I believe your question has two parts, therefore, we suggest two sets of instructions.

How to type fractions in Word 2010, 2013 and 2016:

https://libanswers.walsh.edu/faq/147443

Here are step by step instructions for the "strike-through" process from Wikihow:

https://www.wikihow.com/Cross-Out-Words-in-a-Microsoft-Word-Document

Hope this helps!