Pick a fieid where there's atleast one prophase, metaphase, anaphase, telophase. Count the total number of each type of cell.
Identification :
Prophase - Raisin,
Metapahse - Concentrated in Center
Anaphase - Concentrated in Sides
Telophase - Raisins towards the edges.
Go the center of the "field" count the number of cells in row an column with max count, multiplying those two numbers will give you the total cell count. Sum of the cells in phase can also be obtained.
Number of Cells in Interphase = Total - Cells in Phase
Find their corresponding percentages.
Calculations:
Mitotic Index = Number of Cells in Phase / Totoal Number of Cells.
Generalized Version : Mitotic Index * 19 Hours
Index of Cells = Number of Cells in that Phase / Total number of Cells in Phase
Duration of Mitosis = Mitotic Index * Index of Cells