In lab, suppose that we used $0\mathrm{.}8004$ grams of Calcium carbonate $($MW $100\mathrm{.}09)$ dissolved in $250mL$ and for a $50mL$ allquot it took exactly $40\mathrm{.}32mL$ of EDTA to titrate.

Our $3\mathrm{.}0000$ gram unknown sample was dissolved in $250ml$ and a $50ml$ aliquot was used to determine the unknown concentration. If it took $26\mathrm{.}04mL$ of EDTA to get to the point of colour change, what is the $\%Ca$ in the original sample?