-3/4 + 1/3 . 25% - 1/3
= -3/4 + 1/3 . 25/100 - 1/3
= -3/4 + 1/3 . 1/4 + (-1)/3
= -3/4 . 1/12 + (-1)/3
= -9/12 +1/12 + (-4)/12
= -12/12
= -1
\(\dfrac{-3}{4}\)+\(\dfrac{1}{3}\).25% - \(\dfrac{1}{3}\)=\(\dfrac{-3}{4}+\dfrac{1}{3}.\dfrac{1}{4}-\dfrac{1}{3}\)
=\(\dfrac{-3}{4}+\dfrac{1}{12}-\dfrac{1}{3}\)
= -1