It is 2: and there is no requirement to have a decimal point.
3.5
2.625
2.8
The number 8 wholes and 79 hundredths is 8.79 as a decimal. The whole number goes before the decimal point. Hundredths means two spaces after the decimal point.
If you mean 3 4/3, the the decimal form of that would be 4.3333333333333 <repeating>
tenths , hundreds , thousandths...so 1.067 wholes = 1067 thousandths
2.0
11 and 1/4 is already in its simplest form as a mixed number which is 11.25 as a decimal
Ten fifths make two wholes.
17.001
3.07
2.125