52.85 - 9.09
1. Round '52.85' to the nearest one
52.85 ⇒ 52.9
2. Round '9.09' to the nearest one
9.09 ⇒ 9.1
3. Subtract
52.9 - 9.1 = 43.8
A stock exchange occurs in a centralized location, think Wall Street and the Stock Market. An over-the-counter market does not. Over-the-counter markets are considered less formal compared to exchanges. OTCs are less transparent and operate on fewer rules than exchanges. This can be both good and bad for those involved.
Option 3, Muhammad's successor was elected by the clans.