Answer :

Convert all of them in decimals

3 ÷ 10 = 0.3

0.4

35% ÷ 100 = 0.35

Order from least to greatest--

3/10, 35%, 0.4

3/10 is the smallest 
[tex]3 / 10 = \frac{3}{10}=\boxed{0.3} [/tex]

[tex]35\%= \frac{35}{100}=\boxed{0.35} [/tex]

[tex]We\ have\ the\ numbers:\ 0.3;\ 0.4;\ 0.35\ [/tex]

[tex]\hbox{The numbers are from the smallest to the biggest }: \boxed{0.3\ \textless \ 0.35\ \textless \ 0.4}\\\\ [/tex]

[tex] \frac{3}{10}\ \textless \ 35\%\ \textless \ 0.4 [/tex]