Explanation:
* 27 / 36 turns into 3 / 4 because, in changing fractions to the simplest form, we must use the HCF of the numerator (27) and the denominator (36) to divide both sides.
*Therefore, since 9 is the HCF of 27 and 36, 9 will simplify the 27 into 3 and the 36 into 4( because 9× 3 is 27 and 9 × 4 is 36), which leaves 3 / 4.