15.6
the whole number of parts goes on the left, the "fraction component" goes on the left. 3/5 equals 6/10, which is why the right side of the decimal is 6.
0.15
0.15 = fifteen hundredths
2.015 is already in decimals. In words it is two and fifteen thousandths.
1.0015
0.715
like this 15,000.113
Six and three fifths in decimal form is 6.6
three and fifteen hundreths
0.6
0.6
0.03
0.3