What is the ruling when a husband divorces a fraction of a single divorce?

Chapter on Divorce by Calculation

Al-Mughni

Book of Divorce

Book 39 · Issue 2 · Bab 3

Open in Qurani

Primary text

If a husband declares divorce upon his wife using a fraction of a single divorce, such as saying 'half a divorce' or 'a quarter of a divorce,' one full divorce is established.