Answer: 100 %
%Abundance = part / total 100
%Abundance_1 = parts_1 / total 100
%Abundance_2 = parts_2 / total 100
%Abundance_3 = parts_3 / total 100
%Abundace_1 + %Abundace_2+%Abundace_3 = parts_1/total 100 + parts_2/total100 + parts_3/total100
Factor the right side:
%Abundace_1 + %Abundace_2+%Abundace_3 = [parts_1+parts_2+part2_3]/total 100
Given the sum of the parts = total
%Abundace_1 + %Abundace_2+%Abundace_3 = [total]/total *100 = 100
So, the sum of the individual % of abundaces is 100 %.