Question

Between July 2007 and august 2012, the U.S. dollar depreciated against the Yen. It fell from 120 yen to 77 yen per U.S. dollar. Between January 2012 and July 2015, the U.S. dollar appreciated against the Yen. It rose from 77 yen to 121 yen per U.S. dollar.

1. What is the difference between currency appreciation and currency depreciation.

2. Calculate each one based on the information given above.

Note: i do not need "chegg" answer