8/15÷【(4/9-1/5)×9/15】
=8/15÷(4/9×9/15-1/5×9/15)
=8/15÷(4/15-9/75)
=8/15÷(20/75-9/75)
=8/15÷11/75
=8/15x75/11
=40/11