I need help with this please, I know the opposite IOf 4.6 is -4.6 but I don’t know how to explain it

Solution
Step-by-step explanation:
The opposite of 4.6 is -4.6 because -4.6 is the same distance apart from 0 as 4.6.
The rational number of a decimal would be a fraction.
4.6 as a whole number would be 4, so there's only 0.6 left.
0.6 would be 6 out of 10 or 6/10
6/10 can be simplified into 3/5 by dividing both numbers by 2.
So, the opposite rational number of 4.6 is - 4 3/5.