81 and 78 go into 2106.
81 - 78 = 3
78/81 = 0.963 = 96.3%
78
83
78 + 79 + 80 + 80 + 81 + 81 = 479
3 and 78 = 81.
3 and 78 = 81.
2106
The lowest term of 78 over 81 in fraction form is 26/27
For 98 78 86 88 84 81 93 92 89 and 81: σ=6.2361
the mean is 79.75
It is the middle value which is 81