1－10分之一－一百分之一－一千分之一－…一百万分之一
=1-1/10-1/100-1/1000-1/10000-1/100000-1/1000000
=9/10-1/100-1/1000-1/10000-1/100000-1/1000000
=89/100-1/1000-1/10000-1/100000-1/1000000
=889/1000-1/10000-1/100000-1/1000000
=8889/10000-1/100000-1/1000000
=88889/100000-1/1000000
=888889/1000000