reducible fraction

例句：

1. 1.The cost of this product is reducible by 20%.
   该产品的成本可以降低20%。
2. 2. The amount of waste can be reduced by implementing recycling programs.
   通过实施回收计划，废物量可以减少。
3. 3.The price of oil is reducible by the rise in demand.
   油价可以通过需求上升而降低。