zlacker

Using the OECD numbers[1]:

(USGDPPC - EurozoneGDPPC) / AVERAGE(USGDPPC, EurozoneGDPPC) = 0.283

Roughly speaking, you could write this as "The GDP per capita of the Eurozone is 28.3% lower than the US".

[1] https://stats.oecd.org/Index.aspx?DataSetCode=PDB_LV