How do you write one hundred six hundred-thousandths?

0.00106 The '-ths' means the numbers are on the right side of the decimal. The number of digits on the right hand side is determined by how many zeros would be in the whole number. Eg. 100,000 has 5 zeros, so 106 must be a the end of a 5 digit procession. ___________________________________________________________________ Equally valid would be 100/600,000 the denominator being '600,000ths', or 1.666x10-4