【5-3又7/8÷(1又5/6+2.25×1/3)】÷0.125
=【5-3又7/8÷(11/6+9/4×1/3)】÷1/8
=【5-31/8÷(11/6+9/4×1/3)】×8
=【5-31/8÷(11/6+3/4)】×8
=【5-31/8÷(31/12)】×8
=【5-3/2】×8
=40-12
=28