I find these step by step tutorial very help in understanding these type of algorithms. Here's one that uses excel for doing backprop. https://towardsdatascie

I find these step by step tutorial very help in understanding these type of algorithms. Here's one that uses excel for doing backprop. https://towardsdatascience.com/demystifying-feed-forward-and-back-propagation-using-ms-excel-30f5aeefcfc7 https://towardsdatascience.com/demystifying-feed-forward-and...