6 4 / 1 6 = 6̶ 4 / 1 6̶ = 4 / 1 2 6 / 6 5 = 2 6̶ / 6̶ 5 = 2 / 5 9 5 / 1 9 = 9̶ 5 / 1 9̶ = 5 / 1 ... [1] https://en.wikipedia.org/wiki/Anomalous_cancellatio

6 4 / 1 6 = 6̶ 4 / 1 6̶ = 4 / 1 2 6 / 6 5 = 2 6̶ / 6̶ 5 = 2 / 5 9 5 / 1 9 = 9̶ 5 / 1 9̶ = 5 / 1 ... [1] https://en.wikipedia.org/wiki/Anomalous_cancellation https://en.wikipedia.org/wiki/Anomalous_cancellation