On August 8, 2009, Zimbabwe changed the value of the Zimbabwe dollar from Z 40/$ to Z 60/$.

What was the original U.S. dollar value of the Zimbabwe dollar ($/Z) ? What is the new U.S. dollar value of the Zimbabwe dollar ($/Z)?

Calculate by what percent has the Zimbabwe dollar appreciated (depreciated) relative to the U.S. dollar? and conclude

Calculate by what percent has the U.S. dollar appreciated (depreciated) relative to the Zimbabwe dollar? and conclude