If a condensation polymerization is carried out with equal molar quantities of carboxyl and hydroxyl groups from a difunctional carboxylic acid monomer (two carboxylic groups), and from a tetra functional polyhydroxy monomer (four hydroxy groups), such that a crosslinked gel forms at a given point of monomer conversion what will be the approximate reaction conversion, p, of monomers into polymer at the gelation point.