how to find the formula to work out fga parts in millions

[markinaark]

if you have the following results from a fga
02% 11
co2% 5.6
co ppm 18

co/co2 0.0003
pi % .03

what is the formula used to get the co/co2 ratio that is .0003

this has me baffled.

 

[Toddyplumb]

5.6% convert to PPM = 56000 then 18/56000 = 3.2 x10-4

Or convert 18 PPM to % = 1.8 x 10-3 then 1.8x10-3 /5.6 = 3.2 x 10-4


those 10-4 are 10 to the power of minus4

 

[Dotty]

The way I learned was (CO/CO2)/10,000

so 18/5.6= 3.215

3.215/10,000= 0.0003 (rounded down)

easy

 

[aggis]

Glad the FGA does it but another way is:-

CO 18 millionth = 0.000018
CO2 5.6% = 0.056

CO/CO2 0.000018 /0.056 = 0.00032

Ratio 0.0003

 

[markinaark]

thanks , just couldnt get my head around it. easy when you know how