Using Serial Monitor to get readings off of sensors

Hello again...

I have worked through the tutorials for both the Grove- HCHO Sensor and MQ3 Gas Sensor v1.5 and am displaying values for them. I have opened the Serial Monitor and have had no problems with the code. Are the values displayed in the serial monitor cumulative between both sensors? By values I really mean ratios. I have attached a screenshot of what I am getting:

They are what ever your program displays and how would we know that?
Paul

Post the code, using code tags.

Most example programs for those sensors report the instantaneous value output by the sensor.

Did you "burn in" the sensors for 48-72 hours as required?