What is the ratio of vowels to constant and in the word mathematics? (also how do u know)

Mathematics...total of 11 letters
vowels : there are 4 vowels (a,e,a,i)
consonants : there are 7 consonants (m,t,h,m,t,c,s)

so the ratio of vowels to consonants is : 4/7 or 4:7 or 4 to 7

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