19/100 into decimals is 0,19
To solve this, we must know
To write a fraction based on 10/100/1000... you must move the decimal point to the left the number of times equivalent to the number of zeros in the base.
In this case, base 100 has two zeros. Then move two squares to the left.
This way

Did you see how easy the conversion was under these circumstances?
If you have any question about this solution, you can ask me in the comments :)