1 light-year (ly) is equal to 9.461e15 kilometers.

Therefore, 1 au is equal to 1/100 light-years.

To convert au to light-years, you need to divide the distance in au by 100.

For example, if you want to convert 10 au to light-years, you would divide 10 by 100, which gives you 0.1 light-years.