Decimal equivalent of : $$frac{13}{15} = 0.87$$ $$frac{11}{13} = 0.85$$ $$frac{7}{8} = 0.875$$ $$frac{8}{9} = 0.89$$ Clearly, 0.85 < 0.87 < 0.875 < 0.89 => $$frac{11}{13} < frac{13}{15} < frac{7}{8} < frac{8}{9}$$