How to apply percentage formula to other cells?

Question

Google Sheets

There are 2 columns, in one the sum of all values, and in the other the percentage of the number from the first column from the sum of the values.

Example table
I want to apply the formula from the second column =A2/A1to other cells, but the system does not apply it correctly. Instead, it replaces the cell number of the denominator with the digit of the cell to which the formula is applied. It turns out something like this.

And it is necessary that it be so

How to fix it?

Answer 1

=A2/A$1
Then stretch (apply) as usual.