2又25分之9×[1÷（10分之1+1.08）]
=2.36÷(0.1+1.08)
=2.36÷1.18
=2
8分之7÷{（1.4+5分之1）×1又4分之3-1.05}
=7/8÷{(1.4+0.2)x7/4-1.05}
=7/8÷(1.6x7/4-1.05)
=7/8÷(2.8-1.05)
=7/8÷1.75
=7/8÷7/4
=1/2