Need suggitions from option trading experts

#1
hello senior members i have a doubt about caluclation of premium of a scrip.for example if we consider uco bank sep30 contract TEN DAYS before at 119 underlying price premium is nerly 2.3 rs...but now at the same 119 undelying price premium is 1.1 rs..

please give me sugitions how to caluclate the apporxmate premium with rexpect to time and it current price, and if any aspects should we take consideration in caluclating the premium. i mean to say

if uco bank will raise 2 rs tomorrow what will be the premium and if same 2 rs will raise day after tomorrow what will be the premium
 

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