Bank Error Gives Woman $1.13 billion
Cornelia Johansson got a pleasant surprise when she went online to pay some bills. She found an extra $1.13 billion in her bank account. "The balance was more than 10 billion kronor. It said the amount had been deposited as a correction for a credit card purchase," Ms Johansson's boyfriend Daniel Hoeglund said. A press spokeswoman for the bank, explained the mystery money as "a technical mistake made by a company."
To begin with 1 days interest of x % isn't x/365.
But more importantly 0.51% isn't 0.51.
Well done.