J.R. S. answered 11/01/22
Ph.D. University Professor with 10+ years Tutoring Experience
Pb(NO3)2(aq) + 2KCl(aq) ==> PbCl2(s) + 2NaNO3(aq) ... balanced equation
Find limiting reactant as described in my previous answer to your similar question.
Use the moles of limiting reactant to find moles and grams of PbCl2 (the precipitate)
Take 87.3% of that that answer to give you the actual grams of precipitate formed.
Find remaining KCl as described in my answer to your previous question.