How to convert from varchar to real in MSSQL?

Question

Transact SQL

Good afternoon!
There is a line:

declare @point varchar (100) = '-27,452;26,491;4,299'

I divide it by the symbol ";" and I want to write to a variable of type real:

declare @index int
declare @x real
select @index = CHARINDEX(';', @point)
select @x = cast(substring(@point, 0, @index) as real);

I am getting an error:

Сообщение 8114, уровень 16, состояние 5, строка 41
Ошибка при преобразовании типа данных varchar к real.

When using convert:

select @x = convert(real, substring(@point, 0, @index));

I get the same error
Question removed. It was necessary to replace the symbol "," with the symbol ".":

select @x = convert(real, replace(substring(@point, 0, @index), ',', '.'));