3/7 x 25/19 - 3/7 x 6/19
= 3/7 x (25/19 - 6/19)
= 3/7 x 1
= 3/7
\(\dfrac{3}{7}\times\dfrac{25}{19}-\dfrac{3}{7}\times\dfrac{6}{19}=\dfrac{3}{7}\times\left(\dfrac{25}{19}-\dfrac{6}{19}\right)=\dfrac{3}{7}\times\dfrac{19}{19}=\dfrac{3}{7}\times1=\dfrac{3}{7}\)
