Решите 28 целых2/21 - 25 целых 25/2130 баллов

28 [latex] \frac{2}{21} [/latex] - 25 [latex] \frac{25}{21} [/latex] = 28 [latex] \frac{2}{21} [/latex] - 26 [latex] \frac{4}{21}[/latex] = 1 [latex] \frac{19}{21} [/latex]