I’ve searched multiple topics for a solution and I can’t find one out at all, all I want to do is turn a decimal into a fraction via math in roblox.
For example, .5 into 1/2; I’ve got no clue how to start out with this so I’m just asking here in hopes for some help.
do you want the fraction to be a string?
cuz 1/2 would output 0.5 if it isn’t one
if you want the fraction to be a string I could help out
Yeah, that’s what I’m trying to go for. (Sorry for late reply was trying out something, it didn’t work.)
ill make a function for you 
I have made an example function:
function ToFraction(Number)
local Number = tostring(Number)
local Table = string.split(Number, ".")
local NewNum = Table[1]..Table[2]
local len = string.len(Table[2])
return NewNum / len.."/"..10^len
end
print(ToFraction(0.5))
I don’t know how to make it simplify right now because this is my first time doing this.
actually instead of making my own can I use yours and show how to simplify?
it would be a lot faster for me
Yeah, you can use the script.
Google will usually have answers to questions such as these.
Here’s a good resource: Algorithm-Implementations/dec2frac.lua at master · kennyledet/Algorithm-Implementations · GitHub (2nd google search result by the way)
Example output:
local function print_fraction(...)
print(("%d/%d"):format(fraction(...)))
end
print_fraction(0.5) -- > 1/2
print_fraction(0.25) -- > 1/4
print_fraction(1/3) -- > 1/3
print_fraction(1/25) -- > 1/25
print_fraction(1/123) -- > 1/123
print_fraction(0.6666666666666666666666) -- > 2/3
print_fraction(65872/829753) -- > 5/63
print(math.abs((65872/829753) - 5/63)) -- error of about 0.0000224, but still pretty close
As you can see, it estimates the fraction, but I doubt you’re gonna need to convert big fractions like that anyway
Alright, I think I got it working:
function GCF(Num)
local Number = tonumber(Num)
local T = 0
repeat
T += 1
wait()
until (T / Number) == 1
return T
end
function ToFraction(Number)
local Number = tostring(Number)
local Table = string.split(Number, ".")
local NewNum = Table[1]..Table[2]
local len = string.len(Table[2])
local Factor = GCF(NewNum / len)
local FinalProduct = (NewNum / len) / Factor.."/"..10^len / Factor
return FinalProduct
end
print(ToFraction(0.5)) -- Put your number here
How do I mark a solution for two things? Cause both of your responses seem to literally hit the target on what I was trying to achieve.
I found a problem with your solution tho
if the decimal place gets past 5 digits long it creates a number that isn’t correct
0.1 – works
0.1111 – works
0.11111 – outputs a number that isn’t right and is too big
also the one I made does what yours does but with less code
sometimes it can get past 5 digits such as 0.55555 works
Have you tried your code with numbers other than 0.5? For example 0.25 seems to just never exit the repeat loop. I’m also unsure of why you have a wait() in your code, if the script crashes without a yield then you’re probably not doing something right.
function DecimalToFraction(Number)
local Number = tostring(Number)
local Table = string.split(Number, ".")
local NewNum = Table[1]..Table[2]
local len = string.len(Table[2])
local Numerator = NewNum / len
local Denominator = 10^len
local function GCF(a,b)
if b ~= 0 then
return GCF(b, a % b)
else
return math.abs(a)
end
end
local GCF = GCF(Numerator, Denominator)
return Numerator / GCF.."/"..Denominator / GCF
end
print(DecimalToFraction(0.1)) -- 1/10
print(DecimalToFraction(0.22)) -- 11/100
print(DecimalToFraction(0.333)) -- 111/1000
print(DecimalToFraction(0.4444)) -- 1111/10000
print(DecimalToFraction(0.55555)) -- 11111/100000
this is your code but less code into it
I do recommend this since the function is way smaller
but the question is, how do we get every decimal to work if they are bigger decimals?
Yeah, this was my first time doing something like this so I just threw something together.
I feel like im talking way to much on this post sorry
I’m going to mark this as the solution as I just needed a way to format decimals into fractions while being in a small form factor, @D0RYU @NeonTaco135 @heII_ish Thank you for the help!