Hasil pengurangan dari 2 2/7 - 2 3/21 =

[tex]2 \frac{2}{7} - 2 \frac{3}{21} \\ = \frac{16}{7} - \frac{45}{21} \\ = \frac{48 - 45}{21} \\ = \frac{3 \div 3}{21 \div 3} \\ = \frac{1}{7} [/tex]