Question

помогите пож. 1/4+4/7+9/28

Answer 1

$frac{1}{4} + frac{4}{7} + frac{9}{28} = frac{7}{28} + frac{16}{28} + frac{9}{28} = frac{32}{28} = 1 frac{4}{28} = 1 frac{1}{7}$