Which type of cipher works by rearranging the characters in a message?

Ciphers convert messages from plaintext to ciphertext.
Transposition cipher is the type of cipcher that works by rearranging the characters in a message. This cipcher uses algorithm to rearrange the letters of a plaintext message to form ciphertext.
Other type is the substitution cipher which uses algorithm to replace each character or bit of plaintext with a different character.

According to my brain it's a rational number because it can be put as a fraction