Hello there! How are you today?
First, let's take a look at our numbers.
45 / 100
Both of these numbers have a 0 and a 5, which means it is divisible by 5.
Let's divide both of them by 5.
45 / 5 = 9
100 / 5 = 20
We are now left with 9/20.
This is your simplified fraction since 9 and 20 do not have any common factors.
I hope this helps!