The "$1/17$ modulo $120$" is just ... the result $17x$ is equivalent to $1$ modulo $120$?". In this case, it is $113$. ... M. Winter – M. Winter · 2021-12-02 00:50:54 +00:00 Commented Dec 2, 2021 at 0:50 ... The "mod" operator in computer languages is simply the ... More on math.stackexchange.com

I don't know why you got downvoted instead of getting an answer. There is no dedicated modulus function on the fx-991EX. You can easily find the modulus for positive numbers by using the fraction button and displaying it as a reduced fraction. To find 153 mod 5 input 153/5 and hit =. Then hit Shift "S<=>D" get the reduced fraction. 153/5 = 30+3/5 so 153 mod 5 = 3. Just remember that if the denominator is a factor of m then you'll need to multiply the numerator to get the proper answer. Another easy way to get the modulus is to just use division and multiplication. To find 179 mod 17 enter 179/17. Press the "S<=>D" button to show it in decimal form, 10.52941176. Multiply 17 by the whole number 10 and subtract it from 179. 17 * 10 = 170, 179 - 170 = 9. 179 mod 17 = 9. More on reddit.com

It would appear they either removed it or screwed it up. Used to work in context, as in, 512 % 256 = 0 but 512 % * 256 = 1310.72 (it's doing 512 percent multiplied by 256). Now it appears it's only converting to percentage. You get 0.1 because 10% = 0.1. More on reddit.com

There's remainder (Math, Num), but it doesn't accept negative arguments. More on reddit.com