I want to know the answer to the following question:
Approximately what percentage of Chinese morphemes lack a standard chinese character?
All the background I'm provided with is that "Furthermore, the character inventory used for Mandarin (standard written Chinese) does not correspond to Hokkien words, and there are a large number of informal characters (替字, thè-jī or thòe-jī; 'substitute characters') which are unique to Hokkien (as is the case with Cantonese).". Is that enough to answer the question?
Answer: no