\(\dfrac{7}{4}-\dfrac{3}{5}=\dfrac{35}{20}-\dfrac{12}{20}=\dfrac{23}{20}\)
\(\dfrac{7}{4}-\dfrac{3}{5}=\dfrac{35}{20}-\dfrac{12}{20}=\dfrac{23}{20}\)
\(\dfrac{7}{4}+\dfrac{-3}{5}=\dfrac{35}{20}+\dfrac{-12}{20}=\dfrac{23}{20}\)
\(=\dfrac{35}{20}+\dfrac{-12}{20}=\dfrac{23}{20}\)