\(\dfrac{12}{16}\) < \(\dfrac{16}{◻}\) < \(\dfrac{12}{15}\)
\(\dfrac{12\times4}{16\times4}\) < \(\dfrac{16\times3}{◻\times3}\) < \(\dfrac{12\times4}{15\times4}\)
\(\dfrac{48}{64}\) < \(\dfrac{48}{◻\times3}\) < \(\dfrac{48}{60}\)
64 > \(◻\) \(\times\) 3 > 60
\(\dfrac{64}{3}\) > \(◻\) > \(\dfrac{60}{3}\)
\(\dfrac{64}{3}\) > \(◻\) > 20
\(◻\) = 19