The difference between a and B is 19.8. If the decimal point of a moves to the right by two digits, it is equal to the number of B, then the number of a is______ .

The difference between a and B is 19.8. If the decimal point of a moves to the right by two digits, it is equal to the number of B, then the number of a is______ .

19.8 ÷ (100-1) = 0.2. A: the number of a is 0.2, so the answer is: 0.2