The relations of 20 squares to 100 squares can be expressed in many ways. which of the following is not a way to express the relationships

As there are no options given in the question, but the options in the complete question are;
a) 2/10b) 20%c) 0.02d) 0.2
So, from the given options "c" is not a way to express this.
we can write 20/100 as 2/10 so option a is a way to express given relationship. and if we look at option b, it is also a way to express 20 from 100 is 20%. And if we divide, we get 20/100 = 2/10 = 0.2, so d is also a way to express given relationship. Thus, c is the answer.