The number 200 is already in numerals
1.08 billion written in numerals is 1,080,000,000Depending on your definition of a billion - either 1,080,000,000 or 1,080,000,000,000
It is: 13,200,000,000
7'000'000'000
1,500,000,000
750,000,000,000
2,089,000,000
13,000,000,000
to write seven billion in roman numerals you have to put 7000000000
8.65 billion is written in numerals as 8,650,000,000
935,000,000,000
You would write it as 20,750,000,000. Twenty billion, seven hundred fifty million.