import math

class MathUtilMixin(object):

    def calculateDefaultActivityPercentages(self, number, decimals = 1):
        """Given a number of records it will return a tuple in the form (default_activity_percentage, last_activity_percentage)"""

        if number <= 1:
            return (100.0, 100.0)

        percentage = (math.floor(((100.0/number)*(10**decimals))+0.5)) / (10 ** decimals)
        last_percentage = 100.0 -(percentage * (number - 1))
        return (percentage, last_percentage)