How can i show my work 2 x 43.50 = 435

That's going to be very, very difficult, because 2 x 43.50 is NOT 435.

Now, if you want to solve 2 x 43.5 and show your work, that's easy.

Just take a blank sheet of paper and a pencil, write down 43.50, then

write down 2 under it, and do the multiplication. All of your work is

right there on the paper.