ANSWER
1480.8 is greater than 15.1
Step-by-step explanation
We want to find which number is greater between 15.1 and 1480.8
We see that the highest place value in the number 15.1 is Tens, i.e.:
T U Tnth
1 5 . 1
While in 1480.8, the highest place value is Thousands, i.e.:
T H T U Tnth
1 4 8 0 . 8
Since Thousands is greater than Tens, we see that 1480.8 is greater than 15.1