First let's find the number of ham slices.
90-63 = 27
Then divide it by the total amount to get your percent.
27/90 = 3/10 = 30%
It is 30% ham. Hope this helps!
Here the concept is that we use’l’ to represent the numbers but for number 5 we use 4’l’and we use 1 ’/‘ to represent the number 5 For example: