Suppose the person died May 6, 1889 at the age of 71 years. 1- write the year, month, day as --18890506 subtract the age at death------------710709 3-this gives the figure-----------------18179797 4-now subtract 8870-------------------8870 5- the result is----------------------------18170927 year 1817, 9th month, (Sept), 27th day or 27, Sept, 1817