0.24÷【（8.8-3分之20）】×75%
=24/100÷(44/5-20/3)×3/4
=6/25÷[4*(11/5-5/3)]×3/4
=6/25÷[4*(33-25)/15]×3/4
=6/25÷[4×8/15]×3/4
=6/25×15/32×3/4
=27/320
=320分之27