Which expression is NOT equivalent to left parenthesis 1 fourth space plus space 2 3 over 10 right parenthesis space divided by 5 over 2

Your

2.5 space left parenthesis 0.25 space plus space 2.3 right parenthesis

0.4 left parenthesis 2.55 right parenthesis

0.4 left parenthesis 0.25 space plus space 2.3 right parenthesis

2 over 5 left parenthesis 1 fourth space plus space 23 over 10 right parenthesis