Whats it called when you subtract 1 or more from a number and get its decimal component back as result?

For example, lets say
((x+y)/y) - 1 == x/y

For example
((x+y)/y) == d('1.000041160213365071474861471983496528380123531238424473420976789')
and the right hand side is
(x/y) == d('0.000041160213365071474861471983496528380123531238424473420976789')

Is this trivial or something interesting or a concept that others are familiar with and I just haven't learned?

It's called "distributive property" (school math) and means:
a * (b + c) = a*b + a*c.

((x+y)/y) - 1 = (x/y + y/y) - 1 = x/y + y/y - 1 = x/y + 1 - 1 = x/y

@Fast-Nop sharp and effective for a nop

@Fast-Nop *class in unison* THANK YOU MISTER NOP.

@newbiestnooob the language that you're familiar with will be your best approach. If you're uncertain though, python is easy to find developers for, widely supported, and has plenty of libraries ("batteries included" as it were)

For crypto, a good approach would be to build out a lightening node, because that's going to meet all your needs 1. Ledger support (obviously), 2. Faster transactions than bitcoin even though its built on bitcoin, 3. Lightening network nodes are going to be a big part of bitcoin in the future. Some people will spend spread FUD to push bitcoin cash and a few alternatives, but btc is still the standard. 4. Lightening supports things like smart contracts, which will simplify other aspects of your project, such as fulfilling pledges (in the case of a site that doesnt pay put funds into the full amount is reached).

@Wisecrack t

his wallet system will need to do multiple functions.. receive money.. deduct commission or return funds if fundraiser goal not met

I can do this in a solidarity smart contract.. but my problem is that i need to integrate this into a wordpress or similar hosting

@newbiestnooob well that's an implantation detail. I'm not a wordpress guy, you'll have to ask them.