Question

\(40\dfrac{1}{4}:\dfrac{5}{7}-25\dfrac{1}{4}:\dfrac{5}{7}-\dfrac{1}{2021}\)

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Answer 1

\(=\left(40^1_4-25^1_4\right):\left(\dfrac{5}{7}-\dfrac{5}{7}\right)-\dfrac{1}{2021}\)

\(=15:0-\dfrac{1}{2021}\)

\(=0-\dfrac{1}{2021}\)

\(=\dfrac{-1}{2021}\)