We want to write four different fractions that are equal to 1. Recall that we can think of fractions as a way of writing division.
a/b ⇔ a ÷ b
As a result, a fraction's numerator and denominator need to be the same number for the fraction to equal 1. This is the case because dividing a number by itself always gives 1.
a/a = 1 ⇔ a ÷ a = 1
Let's then take four different numbers, 6, 13, 2, 9, and write four different fractions, each with the same number in the numerator and denominator. Here they are.
6/6, 13/13, 2/2, 9/9
We can check that these fractions are equal to 1 using a calculator. For each fraction we write the numerator divided the denominator and press ENTER.