I cannot answer this question 20.4 = ? tenths

The question asked in this query is the place order of the number value 20.4 and what is the tenths? We can further explain the state order values of the number is expanded form thus,

1. 20.0 - tens

2. 0.4 - tenths

Now, which is the tenths in the number? It is the digit number of 0.4