\(\dfrac{75}{100}+\dfrac{3}{4}\times29+75\%\times30+0,75\times40\\ =\dfrac{75}{100}\times1+\dfrac{75}{100}\times29+\dfrac{75}{100}\times30+\dfrac{75}{100}\times40\\ =\dfrac{75}{100}\times\left(1+29+30+40\right)\\ =\dfrac{75}{100}\times100=75\)
\(\dfrac{75}{100}+\dfrac{3}{4}\) x 29 + 75% x 30 + 0,75 x 40
= 0,75 x 1 + 0,75 x 29 + 0,75 x 30 + 0,75 x 40
= 0,75 x (1 + 29 + 30 + 40)
= 0,75 x 100
= 75