To cancel the fraction 27/0.9, you can multiply both the numerator and denominator by 10.

27/0.9 = (27 * 10) / (0.9 * 10) = 270/9

Now, you can simplify the fraction by dividing both the numerator and denominator by their greatest common divisor, which is 9.

270/9 = 30/1 = 30