How do you write 66 tens 18 ones 9 hundredths in decimal?

See the table is here::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::;

Hundreds :::::::Tens:::::::::Ones:::::::::Tenths::::::::hundredths:::::::thousandths

You write it as :

678.09

You multiply the 66 by ten and 18 by One and 9 is divided by 100.

Then all are added up.