We know that adding '0' before a number does not change the value that is on the left of the decimal point.
Similarly, adding '0' after a number does not change the value that is on the right of the decimal point.
Hence, among the given options, 0.30 represents the same decimal number as 0.3.
1.30 represents the same decimal number as 1.3.
0.030 represents the same decimal number as 0.03.