What fraction of its original mass does a Sun-like star lose via the steady solar wind over its entire main-sequence life?

Answer

About $0.01$ percent

Over the Sun's $\sim 10$ billion year main-sequence life, the total mass shed through the steady solar wind amounts to only about $10^{-4}$ solar masses, which is equivalent to $0.01$ percent of its original bulk.

What fraction of its original mass does a Sun-like star lose via the steady solar wind over its entire main-sequence life?
astronomystarradiationmassLoss