UK and France are ~1/3 lower. Italy and Spain are ~50% lower.
1: https://tradingeconomics.com/european-union/gdp-per-capita
(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".