(5/8+13/16+11/46)÷(5/4+13/8+11/23)
=(1/2×5/4+1/2×13/8+1/2×11/23)÷(5/4+13/8+11/23)
=1/2×(5/4+13/8+11/23)÷(5/4+13/8+11/23)
=1/2