This character is a Other Punctuation and is mainly used in the Arabic script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it is written as end of a European number, e.g., a currency symbol, from left to right. When changing direction it is not mirrored. U+066A prohibits a line break before it, if it follows a number. The glyph can be confused with one other glyph.
The Wikipedia has the following information about this codepoint:
The percent sign% (sometimes per cent sign in British English) is the symbol used to indicate a percentage, a number or ratio as a fraction of 100. Related signs include the permille (per thousand) sign ‰ and the permyriad (per ten thousand) sign ‱ (also known as a basis point), which indicate that a number is divided by one thousand or ten thousand, respectively. Higher proportions use parts-per notation.
Representations
System
Representation (click value to copy)
Nº
1642
UTF-8
D9 AA
UTF-16
06 6A
UTF-32
00 00 06 6A
URL-Quoted
%D9%AA
HTML hex reference
٪
Wrong windows-1252 Mojibake
Ùª
Encoding: CP864 (hex bytes)
25
Encoding: GB18030 (hex bytes)
81 31 8A 36
Adobe Glyph List
afii57381
Adobe Glyph List
percentarabic
RFC 5137
\u'066A'
Bash and Zsh inside echo -e
\u066A
C and C++
\u066A
C#
\u066A
CSS
\00066A
Excel
=UNICHAR(1642)
Go
\u066A
JavaScript
\u066A
Modern JavaScript since ES6
\u{66a}
JSON
\u066A
Java
\u066A
Lua
\u{66A}
Matlab
char(1642)
Perl
"\x{66A}"
PHP
\u{66a}
PostgreSQL
U&'\066A'
PowerShell
`u{66A}
Python
\u066A
Ruby
\u{66a}
Rust
\u{66a}
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