Question

How can I show her numbers are related to each other

Answer 1

You can show the relation of both number by simply identifying th place value of each digits.
For example, the number is 555.55
=> First 5 in the left has a hundreds value, followed by tens and ones.
=> then the number next to decimal point has a value of tenths and the next is hundredths.

Now, how the find the relationship of the given number
=> Each number has 10 times difference with each other.
=> 0.05 x 10 = 0.5
=> 0.5 x 10 = 5
=> 5 x 10 = 50
=> 50 x 10 = 500
=> 555.55