\(\dfrac{0,8\times0,4\times1,25\times25+0,725+0,275}{1,25\times4\times8\times25}\\ =\dfrac{\left(0,8\times1,25\right)\times\left(0,4\times25\right)+\left(0,725+0,275\right)}{\left(1,25\times8\right)\times\left(4\times25\right)}\\ =\dfrac{1\times10+1}{10\times100}\\ =\dfrac{10+1}{1000}\\ =\dfrac{11}{1000}\)