Sorry but I would say the answer is "none" in that exercising does not lead to weight loss.
Changing your diet permanently is the only way to achieve lasting weight loss, I'm afraid.
To begin with, cut down as much as you possibly can on Ultra Processed Food (UPF). Try only to eat real food, not manufactured stuff. So no takeaways, no ready-meals, nothing packaged that claims to be "low fat" or "healthy".
So concentrate on fresh vegetables and fruit daily, fresh lean meat (not sausages or burgers) a couple of times a week; fish a couple of times a week; plenty of beans and legumes (kidney beans, black beans, lentils, chickpeas etc), fresh salads, nuts and also eggs, cheeses, olive oil and so on.
Try to ensure that at least two thirds of every meal is vegetables.