Bjrn bought 300 shares of Danske Bank A/S for DKK170 (Danish krone) per share on October 1,

Bjørn bought 300 shares of Danske Bank A/S for DKK170 (Danish krone) per share on October 1, 2018. Unfortunately, a major newspaper reveals the very next day that the bank is being investigated for money laundering, and the price of its shares falls by 25%. What is the percentage increase now required for the value of Bjørn’s stock to get back to what he paid for it?