7per10 dikurang 3per6. 3per4 dikurang 2per12

semoga terbantu ya, maaf kalau ada salah

[tex] \frac{7}{10} - \frac{3}{6} \\ = \frac{21}{30} - \frac{15}{30} \\ = \frac{6 \div 6}{30 \div 6} \\ = \frac{1}{5} \\ \\ \frac{3}{4} - \frac{2}{12} \\ = \frac{9 - 2}{12} \\ = \frac{7}{12} [/tex]