In this question

We follow rule of BODMAS and then solve by rule of decimals

$\begin{array}{l}\text{ 28.217}-\text{14.241 + 6.873}-\text{2.434 =?}\\ \Rightarrow \text{ 28.217 + 6.873}-\text{14.241}-\text{2.434 = ?}\\ \Rightarrow \text{\hspace{0.17em}\hspace{0.17em}35.09}-\text{16.675 =?}\\ \Rightarrow \text{1 8.415 =?}\end{array}$

Hence, Option E is correct.