Answer :
(7.5 + 8.35 + 10.05 + 8.25 + 7.75) / 5 = 41.9/5 = 8.38 <== average hrs worked per day.
10.05/41.9 = 0.239 = 23.9% <== percentage of total hrs taken up by wednesday
10.05/41.9 = 0.239 = 23.9% <== percentage of total hrs taken up by wednesday