25分之4÷((40%+3分之1)×11分之9)

问题描述:

25分之4÷((40%+3分之1)×11分之9)

4/25÷((40%+1/3)×9/11))
=4/25÷((2/5+1/3)x9/11)
=4/25÷(11/15x9/11)
=4/25÷3/5
=4/25x5/3
=12/5
=2.4