20 out of 100 is 0.20
One hundred twenty ten-thousandths in decimal form is 0.0120
0.120
120,000,000.000
0.23
120.5
Being English I write it as: one hundred and twenty, and nine hundredths; or one hundred and twenty point zero nine. Americans are likely to write it: one hundred twenty and nine hundredths
One thousand six hundred twenty and three tenths in decimal form is: 1,620.3
0.123
1.324
1.324
It is 120.5
0.125