Translations:Basic Field Epi: Manual/560/en
There are 100 cows in Kabupaten 1 and 10 of these are classified as cases, leading to an attack rate of 10/100= 0.1 or 10%. There are 300 cows in Kabupaten 1 and 84 of these are classified as cases, leading to an attack rate of 84/300= 0.28 or 28%.