Karnataka assembly has 225 legislators (224 elected and 1 nominated).
So ideally, the required number to pass the floor test is 113, or support of 113 MLAs to the government.
Table: Status of Karnataka Assembly
* Including the 13 MLAs who have resigned + Speaker + Nominated Member
** Including the 3 MLAs who have resigned
After the resignations, numbers of MLAs with the coalition government have come down to 102 if none of the MLAs withdraw their resignations.