Ta có: \(\dfrac{0.25\cdot3.2\cdot54\cdot1.25+36}{0.9\cdot28+1.8\cdot3.6}\)
\(=\dfrac{0.8\cdot1.25\cdot54+36}{0.9\left(28+2\cdot3.6\right)}\)
\(=\dfrac{54+36}{0.9\cdot\left(28+7.2\right)}\)
\(=\dfrac{90}{0.9\cdot35.2}\)
\(=\dfrac{100}{35.2}=\dfrac{1000}{352}=\dfrac{125}{44}\)