[tex]\frac{6}{7} = \frac{6 * 8}{7 * 8} = \frac{48}{56}\\\frac{8}{9} = \frac{8 * 6}{9 * 6} = \frac{48}{54}\\\frac{16}{25} = \frac{16 * 3}{25 * 3} = \frac{48}{75}\\\frac{4}{5} = \frac{4 * 12}{5 * 12} = \frac{48}{60}\\\frac{12}{17} = \frac{12 * 4}{17 * 4} = \frac{48}{68}[/tex]
