Пошаговое объяснение:
(1/3-5/16)÷(1/6-1/8)=1/48÷1/24=1/48×24/1=
=1/2
1/3-5/16=(1×16-5×3)/48=1/48
1/6-1/8=(1×4-1×3)/24=1/24
(5/7-2/3)÷(4/9-5/12)=1/21÷1/36=1/21×36/1
=36/21=12/7=1 5/7
5/7-2/3=(5×3-2×7)/21=1/21
4/9-5/12=(4×4-5×3)/36=1/36
