How does Radiocarbon Dating Work?

Radio-carbon dating works by measure the ratio of carbon 14 to carbon 12 in a fossil and comparing it to the ration that is found in nature. When a fossil is made the amounts of carbon 12 and 14 are locked in. But, since carbon 14 is radioactive and decays the amount of carbon 14 will decrease and carbon 12 will increase in the fossil. This marks how old the fossil is.