Here's an old one, each letter of the alphabet represents a number
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
EQUALS
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
THEN,
K + N + O + W + L + E + D + G + E
11+14+15+ 23+12 +5 + 4 + 7 + 5 = 96%
H + A + R...