Final answer:
To find the percentage, divide the number of pieces of the specific item (69) by the total number of pieces (13), then multiply by 100. Therefore, 69 pieces is approximately 530.77% of the total 13 pieces of round bar.
Step-by-step explanation:
To find the percentage, divide the number of pieces of the specific item (in this case, 69 pieces of round bar) by the total number of pieces (13 pieces), then multiply by 100. So in this case, the calculation would be (69/13) x 100 = 530.77%. Therefore, 69 pieces is approximately 530.77% of the total 13 pieces of round bar.