To convert lbs to tonnes divide by 2204.622. I've generated some hopefully helpful examples randomly below, as with most random sentences please excuse the repetitive and occasionally comic outcomes.
In 240 lbs of lentils there are 0.1088622 tonnes, to achieve this take 240 and just divide by 2204.622.
You have 570 lbs of flour but you need to know how many tonnes that is. To get the answer divide by 2204.622 which gives you 0.25854772 tonnes.
How many tonnes of sugar are there in 750 lbs? Just divide by 2204.622 to get the answer of 0.34019437 tonnes.