13 is 26% of what number?

13 is 26% of 50

Step-by-step explanation:

Hope this helps

13 is 26% percent of 50.

Step-by-step explanation:

You would multiply 13 by 100 and then divide the total by 26.

Hope this helps!

They are important for several reasons.
First of all, they help us make sure that equations/theorems are correct, so that we are not just assuming things to be correct. Mathematicians still assume things are correct a lot, at least when it comes to the higher maths, so when someone proves/disproves a theorem, it can have major implications.
Second, they help others to understand why something is correct or not.
Lastly, I personally believe that they're important because they show that there is more of an understanding to whatever the proof is about, rather than just assuming that certain things are just correct, but we can't explain why. If we didn't have proofs, a lot of the higher maths, and even High School / Middle School maths would be incomplete, and in many cases not possible for us to know if any of the maths are actually correct.