Description: Learn how to convert the repeating decimals 0.77777... and 1.22222... to fractions. Created by Sal Khan. So let's say I had the repeating decimal 0.7. So this is the same thing as 0.7777 and I could just keep going on and on and on forever with those 7s. So the trick to converting these things into fractions is to essentially set this equal to a variable.*Teacher Advisor is 100% free.