noun
destruction rate; destruction ratio
Technical term used in engineering, disaster analysis, or military contexts to express the proportion of something destroyed.
地震による建物の破壊率は地域によって大きく異なる。
The destruction rate of buildings due to the earthquake varies greatly by region.
このシミュレーションでは、ミサイルの破壊率を80%と仮定した。
In this simulation, we assumed a missile destruction ratio of 80%.
損傷率 means 'damage rate' and is broader, covering any damage, not necessarily complete destruction.
Compound of 破壊 (destruction) and 率 (rate, ratio).