Members of a park-walking club were asked how often do they visit a gym or other exercise facility outside their home. The following results were compiled after the survey: 0 visits per week: 9 1-3 visits per week: 7 4-6 visits per week: 16 7 or more visits per week: 3 What is the cumulative relative frequency of club members who exercise publicly for six or fewer times per week?

Let's start off with some basics to get you familiar with the term remainder.

7 / 3 = 2.333r   or 2 remainder 1, because 3 fits into 7 twice, with 1 left over.
7/4 = 1 remainder 3
8/4 = 2 remainder 0, however we don't say remainder 0, we just say '2'.

So 860 / 14 = 61.428 (3DP). We can then multiply 61 by 14, and that difference will be the remainder.
14* 61 = 854. 
860 - 854 = 6.

The remainder of 860 divided by 14 is 6