Simple mathematical question

[Tokatubs]

Hi.

I have a resident script with 2 sec sleep interval. I try to write a simple mathematical calculation to the variable named "D". The group adress behind variable "D" is datatype 05.001 %. How can i make this work i Lua?

A = grp.getvalue ('6/6/1')
B = grp.getvalue ('6/6/2')
C = grp.getvalue ('6/6/4')
D = grp.write ('6/6/10')

D=(B-A/C-A)*100


BR
Kai-Roger

I have no idea, but maybe this will work

A = grp.getvalue('6/6/1')
B = grp.getvalue('6/6/2')
C = grp.getvalue('6/6/4')
D = math.round((B - A) / (C - A) *100, 2)
grp.write('6/6/10', D)