\(\left(\dfrac{2}{3}-\dfrac{1}{5}\right).\dfrac{15}{8}-\dfrac{1}{8}\)
\(=\dfrac{7}{15}.\dfrac{15}{8}-\dfrac{1}{8}\)
\(=\dfrac{7}{8}-\dfrac{1}{8}\)
\(=\dfrac{6}{8}\)
\(=\dfrac{3}{4}\)
\(\left(\dfrac{2}{3}-\dfrac{1}{5}\right)\times\dfrac{15}{8}-\dfrac{1}{8}\)
\(=\left(\dfrac{10}{15}-\dfrac{3}{15}\right)\times\dfrac{15}{8}-\dfrac{1}{8}\)
\(=\dfrac{7}{15}\times\dfrac{15}{8}-\dfrac{1}{8}\)
\(=\dfrac{7\times15}{15\times8}-\dfrac{1}{8}\)
\(=\dfrac{7}{8}-\dfrac{1}{8}\)
\(=\dfrac{7-1}{8}\)
\(=\dfrac{6}{8}=\dfrac{3}{4}\)