tenth; tithe
予算の十分の一しか使えない状況だ。
We're in a situation where only a tenth of the budget can be used.
予想の十分の一の来場者数にがっかりした。
We were disappointed by the turnout, which was a tenth of what we expected.
教会では収入の十分の一を献金する慣習があった。
There was a custom in the church of donating a tenth of one's income.