A fraction.
2.45 is a fraction and there is no way to represent it as a whole number. The whole part of it is 2.
A simple fraction represents a part of the whole.
128.726 is a mixed number and there is no way to represent it as a whole number. The whole part of it is 128.
5.28 is a mixed number and there is no way to represent it as a whole number. The whole part of it is 5.
7.052 is a mixed number and there is no way to represent it as a whole number. The whole part of it is 7.
The figure of speech used to represent the whole of a part or part of a whole is called synecdoche. It involves using a specific part of something to represent the entire thing or using the entire thing to represent just a part of it.
2.45 is a fraction and there is no way to represent it as a whole number. The whole part of it is 2.
810.4 is a fraction and there is no way to represent it as a whole number. The whole part of it is 810.
synecdoche
A simple fraction represents a part of the whole.
128.726 is a mixed number and there is no way to represent it as a whole number. The whole part of it is 128.
5.28 is a mixed number and there is no way to represent it as a whole number. The whole part of it is 5.
7.052 is a mixed number and there is no way to represent it as a whole number. The whole part of it is 7.
6.148 is a mixed number and there is no way to represent it as a whole number. The whole part of it is 6.
8.35 is a mixed number and there is no way to represent it as a whole number. The whole part of it is 8.
0.4 is a mixed number and there is no way to represent it as a whole number. The whole part of it is 0.
0.0089 is a mixed number and there is no way to represent it as a whole number. The whole part of it is 0.