YOU SAID:

I am ninety percent sure that I am amazing at eating lunch.

INTO JAPANESE

私は昼食を食べるのが素晴らしいと 90% 確信しています。

BACK INTO ENGLISH

I am 90% sure that eating lunch is great.

INTO JAPANESE

私は、昼食を食べることが素晴らしいと 90% 確信しています。

BACK INTO ENGLISH

I am 90% sure that eating lunch is great.