Final answer:
The whole number part of the mixed number (86)/(13) is 6.
Step-by-step explanation:
To calculate the mixed number from (86)/(13), we need to divide the numerator (86) by the denominator (13). Upon division, we obtain a quotient of 6 and a remainder of 8. The quotient represents the whole number part of the mixed number. Therefore, the whole number part is 6.