Lightning speed would be "kaminari no hayasa."
You write a number, not wright! It would be written as 75% of [the number].
To write 7 as an ordinal number, you would write it as "seventh."
To write the number in digits, you would write it like this: 95,032,659,004.
You write 2.875 as a mixed number as: 27/8
You would write it out in number form like this 6,000
MMMDC
You would write it exactly as in the question.
865,500,000,000 would be one way to write it. Another would be 8.655x10^11
93000000 is, itself a whole number so you would write it exactly as in the question.
You would write it like this 1.0761911
I would write 18,000,000 as eighteen million