can you please do all work in steps on a paper if possible

Exercises: The Foreign Exchange Market and Exchange Rate Determination EXERCISE 9 (Exchange rate determination) In early August 2002 (the exact date is a state secret), North Korea reduced the official value of the won from $0.465 to $0.0067. The black market value of the won at the time was $0.005. a) By what percent did the won devalue? b) Following the initial devaluation what further percentage devaluation would be necessary for the won to equal its black market value