a: \(\dfrac{49\cdot54+18}{49\cdot55-30}\)
\(=\dfrac{49\cdot54+18}{49\cdot54+49-30}=\dfrac{49\cdot54+18}{49\cdot54+19}< 1\)
b: \(\dfrac{67\cdot44+9}{66\cdot45-27}\)
\(=\dfrac{\left(66+1\right)\left(45-1\right)+9}{66\cdot45-27}\)
\(=\dfrac{66\cdot45-66+45-1+9}{66\cdot45-27}\)
\(=\dfrac{66\cdot45-13}{66\cdot45-27}>1\)