In 2020 which US state shortened its official name by more than half?

From 1790 until 2020 one of the original 13 states of the USA was officially named the "State of Rhode Island and Providence Plantations" (written out as 42 characters and 6 spaces).

In November 2020 there was a ballot measure that proposed to change the official name of the state from "State of Rhode Island and Providence Plantations" to "State of Rhode Island": the proposal passed with 53% of the vote. So, now it is just "State of Rhode Island", the official name can be written as 18 characters and 3 spaces.

Perhaps a little bit easier for official headed notepaper.