How do you write 7.5 in words
One hundred ten trillion.
You can write one hundred twelve thousand.
Eighth.
three and twenty-five thousandths
15 billion
15000000000 + 2014 years.
15000000000
15000000000 cm
1500000
15000000000
15000000000 yrs
15000 x 1000000 = 15000000000
100000000000.
0.0625
0.1351
Depends on the convention where you are. In the USA its fifteen billion but in the UK and some other places fifteen billion is 1,000 times larger. Fifteen thousand million should be clear in any case.