You write, you do not right.
5 and 26 hundreds = 5 + 26*100 = 5 + 2600 = 2605
You do not need to ad a decimal point.
5.26
1.23
It is 0.23
30.2 which is the same as 30.20
.88
Two and twenty five hundreds written in decimal form is 2.25.
21.021
30.20
2400
0.00025
twenty-five hundreds = 2500
50.505