To convert 3.6 into a fraction, we first recognize that it can be expressed as 3.6/1. To eliminate the decimal, we can multiply both the numerator and the denominator by 10, which gives us:
3.6 × 10 = 36 and 1 × 10 = 10,
So, we have:
36/10
Next, we can simplify this fraction by dividing both the numerator and the denominator by their greatest common divisor, which is 2:
36 ÷ 2 = 18 and 10 ÷ 2 = 5,
This results in:
18/5
Therefore, 3.6 as a fraction is 18/5.