Hi, MeNna!

"Much higher" means "significantly higher." It is often used for comparing altitude or amount. For instance:

"The pyramids are much higher than the Sphinx."

"The price of a car is much higher than the price of a computer."

In both of these examples, not only is one higher than the other, but the difference in altitude or amount is noticeable and significant.

I hope my answer helps. Please let me know if you're still confused.

How much is "much"?

"much" means a large amount or to a large/high degree.

Unfortunately, the word "much" is an unknown amount or number.
So, the 'large amount' depends on the subject or topic or even a person's opinion.
For example:
- If you or I paid $100 for dinner, that would be a large amount, but it would not be much if the person was a millionaire.
- If 1,000 people attended a concert last year and 20,000 people attended this year, then we could say that the attendance this year was much higher than last year.

Mr. Zhang 

Thank you very much!

Yes, I understood, but I have a question! :)

In this sentence " the numbers would be much higher " does the expression "much higher" have the same meaning?