Ans
I = sqrt(P/R)
Step-by-step explanation:
You divide both sides by R first
P/R = I^2 R/R
So,
I^2 = P/R
take the square root of both sides
I = sqrt(P/R)
Hmm this seem rather complicated would you send me more details
So :

?
First, you want to bring everything together on the top of the fraction.
12=24/2 so you can have

Add like terms -- 12 +24 = 36

Now we are at

Which is the lowest possible simplified version while remaining at exact value.
Feel free to check my math! I kinda did this off the top of my head.
It is equivalent to 23/99 but not for the rest.
As the denominator gets larger, the decimals gets smaller.
eg. 23/999 = 0.023232323...
As you can see , it is 0.02 now so it is not equivalent to 0.232323 as it is 0.2