Based on the mole ratio you determined in Part C, what is the empirical formula of this

Fantastic news! We've Found the answer you've been seeking!

Question:

Based on the mole ratio you determined in Part C, what is the empirical formula of this compound?

Carbon: 6.66 Hydrogen: 19.8
Express your answer as a chemical formula.
Part C answers are correct but, it will not let me insert a decimal in subscript or super script which is silly. How would I do this