The procedure to calculate the geometric and harmonic mean are given below. The harmonic mean is always less than the geometric mean which is always less than the arithmetic mean. It is calculated by dividing the number of observations by the reciprocal of each number in the series.
This video is meant to explain the intuition behind the formula used to calculate the harmonic mean.
For example you may. If n is the number of numbers it is found by dividing the number of numbers by the reciprocal of each number. The harmonic mean is always less than the geometric mean which is always less than the arithmetic mean. Mean of a setof nnumbers add the reciprocalsof the numbers in the set divide the sumby n then take the reciprocal of the result.