chem, calculate empirical formula

For some reason, I can't do this question. I can usually do % by mass composition things fine, but this one wont work for me. I'm probably just being retarded, but help?

Calculate the empirical formula of X which has the following composition by mass -

K - 32%
Cr - 21.3%
F - 46.7%

RMM

K - 39
Cr - 52
F 19

i get CrK2F6

32/39 = 0.82051282051282051282051282051282
21.3/52 = 0.40961538461538461538461538461538
46.7/19 = 2.4578947368421052631578947368421
--------------
1/ 0.40961538461538461538461538461538 = 2.4413145539906103286384976525845
--------------
2.4413145539906103286384976525845 * 0.82051282051282051282051282051282 = 2
2.4413145539906103286384976525845 * 0.40961538461538461538461538461538 = 1
2.4413145539906103286384976525845 * 2.4578947368421052631578947368421 = 6
--------------
K2CrF6

agreed

aMb

32/39 = 0.82051282051282051282051282051282
21.3/52 = 0.40961538461538461538461538461538
46.7/19 = 2.4578947368421052631578947368421
--------------
1/ 0.40961538461538461538461538461538 = 2.4413145539906103286384976525845
--------------
2.4413145539906103286384976525845 * 0.82051282051282051282051282051282 = 2
2.4413145539906103286384976525845 * 0.40961538461538461538461538461538 = 1
2.4413145539906103286384976525845 * 2.4578947368421052631578947368421 = 6
--------------
K2CrF6

hw the hell did you guys do this?
isnt the empirical formula done by ratios?
umm..i think i got it......but i dnt remember using percentages, they gaves us teh mass of each and u had to dvide by molecular mass, hw do u use the percentage to get the ratios?