Given two strings, determine the percentage that one loves the other in the following way:

YOU LOVES MATLAB

there is 1 'L', 1 'O', and 0 of 'V', 'E' and 'S' for the string 'YOUMATLAB' giving 11000. You must add the adjacent digits until you get a two digit 'percentage' as an answer. (if the sum is over 9, add those digits in the next sequence.) 11000>2100>310>41% (the % need not be in the output)

I found this game in an old journal written by a friend when she was 6 years old, testing the compatibility of her older sister with boys in her class.