Question

9/35-3/28
помогите пожалуйста

Answer 1

$frac{9}{35}- frac{3}{28}= frac{9*4}{7*5*4} - frac{3*5}{7*4*5} = frac{36}{140} - frac{15}{140} = frac{21}{140} = frac{3}{20}$

Answer 2

36/140-15/140=21/140