(9 - 2 2\3 х 2 1\7) х 21\46= 

(9 - [latex] \frac{8}{3} [/latex]*[latex] \frac{15}{7} [/latex])* [latex] \frac{21}{46} [/latex] = ( 9 - 5 [latex] \frac{5}{7} [/latex] ) * [latex] \frac{21}{46} [/latex] = 3 [latex] \frac{2}{7} [/latex] * [latex] \frac{21}{46} [/latex] = [latex] \frac{3}{2} [/latex] = 1 [latex] \frac{1}{2} [/latex] = 1,5