Good Math!

If:
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

Is represented as:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 2122 23 24 25 26

Then:

H-A-R-D-W-O-R- K
8+1+18+4+23+15+18+11 = 98%

and

K-N-O-W-L-E-D-G-E
11+14+15+23+12+5+4+7+5 = 96%

But,

A-T-T-I-T-U-D-E
1+20+20+9+20+21+4+5 = 100%