Germination percent= (Ni/Ti) *100
Ni: Number of germinated seeds in the last day of germination
Ti: Number of total seeds
I agree with Mujo Hasanović but it depends what you're trying to measure and on what day
....are weights given to the days of the germination. Timson germination index (TGI) = ΣG/T, where G is the percentage of seed germinated per day, and T is the germination period. https://benthamopen.com/FULLTEXT/TOECOLJ-9-1-13
Germination Index (GI) or, under field conditions, Emergence Index (EI) is an estimate of the time (in days) it takes a certain germination percentage to occur. https://www.researchgate.net/post/how_to_decide_the_day_one_to_calculate_germination_index_GI
The equation to calculate germination percentage is: GP = seeds germinated/total seeds x 100 . The germination rate provides an measure of the time course of seed germination. https://employees.csbsju.edu/ssaupe/biol327/Lab/Seeds/germination_percentage.htm
In agriculture and gardening, the germination rate describes how many seeds of a particular plant species, variety or seedlot are likely to germinate over a given period. It is a measure of germination time course and is usually expressed as a percentage, e.g., an 85% germination rate indicates that about 85 out of 100 seeds will probably germinate under proper conditions over the germination period given. Seed germination rate is determined by the seed genetic composition, morphological features and environmental factors. The germination rate is useful for calculating the number of seeds needed for a given area or desired number of plants. For seed physiologists and seed scientists "germination rate" is the reciprocal of time taken for the process of germination to complete starting from time of sowing. On the other hand, the number of seed able to complete germination in a population is referred as germination capacity. https://en.m.wikipedia.org/wiki/Germination
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