Question 1082074
After the first day there were 5/7 of the original number remaining:  70
After the 2nd day there were 3/7 remaining from the number the 2nd day started with (which is the same number as we ended with AFTER the first day):  70*3/7 = 30
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Or, we can combine everything into one calculation:
{{{ 98*(5/7)*(3/7) = (98/49)*5*3 = 2*5*3 = highlight(30) }}}