To arrange in descending order we need to know the largest to smallest number order
we starting checking from the left to write
the given numbers are 7.29,7.03,7.30, 8.06
The left most digits are 8,7,7,7 - 8 is more
8.06 is the largest number
among 7.03, 7.30, 7.29
Left most digits are same so we check the first digit after the decimal
3>2>0
so the descending order : 8.06 > 7.30> 7.29>7.03