Accuracy of the Model and invoid is overfitting

when I build a class funtion about StopMyCallbacks in then I see it stop in the first steps 1/15 epochs and resulted greater than 72% so I want to know how many percent accuracy will fit of model and invoid overfitting

Perhaps you could plot out the accuracy/loss for both training sets and validation sets.
If you find an obvious deviation between training behaviour and validation behaviour, your model may be overfitted.
Just FYI. I’m also not sure, it’s hard to specify.