I am trying to figure out how to calculate dewpoint from temperature and humidity. The formula is ridiculously long, but there is a simple formula that gives an approximation, which is good enough for my purposes.
Td = T - ((100 - RH)/5).
Td = Dewpoint in degrees Celcius
T = Temperature in degrees Celcius
RH = Humidity
Since my phone is in degrees F. I had to convert to degrees C. This is what I did, but it doesn't work, I think because of the % symbol attached to the humidity variable: $int((#WCTEMP#-32)*5/9))-(100-#WCHUM#)/5)$. The problem is, it just displays exactly what I typed, it doesn't do the math. Can anyone point a noob in the right direction? It is probably obvious, but I am still trying to figure out zooper.
I have seen other requests for a dewpoint variable on the forums, so there is a demand out there. Any help would be appreciated, thanks!