Question

Помогите решить 7/9÷(-2/27)÷(-5 1/4)×1 2/7 это дроби

Answer 1

7/9÷(-2/27)÷(-5 1/4)×1 2/7=2 4/7
1)7/9÷(-2/27)=-7×27/9×2=-21/2
3)-21/2÷(-5 1/4)=-21/2÷(-21/4)=4×21/2×21=2
3)2×1 2/7=2×9/7=18/7=2 4/7