一种石英表,先涨1/10,后降低1/10,此时售价为94.5元,问原价

问题描述:

一种石英表,先涨1/10,后降低1/10,此时售价为94.5元,问原价

原价
=94.5÷(1-1/10)÷(1+10%)
=94.5÷0.9÷1.1
=105÷1.1
=95.45(元)