So using the conversion of 1 metric ton to kg, we see that there are 1000 kg in 1 ton. Then we can divide 40 by 1000 to find the decimal:
[tex] \frac{40}{1000}=0.04 [/tex]
Then to convert this decimal to a percentage, we must multiply by 100%:
[tex] 0.04*100=4 [/tex]
So now we know that 40 kg is 4% of 1 ton.
