ten percent; one-tenth
Used to express a proportion or fraction, especially in financial, statistical, or everyday contexts.
売り上げが前年より１割増えた。
Sales increased by ten percent compared to the previous year.
この商品は定価の１割引で買える。
You can buy this product at a ten percent discount.
This shirt is currently 10% off.
Sales increased by ten percent this year.
One in ten respondents said they were opposed.
パーセント is the direct loanword equivalent of 'percent', while １割 is the traditional Japanese way of saying 10パーセント, common in discounts and ratios.
Standard spelling using Arabic numeral; common in modern writing.
Kanji numeral spelling; also used but less common than the Arabic numeral form.
Compound of 一 (いち, 'one') and 割 (わり, 'tenth'). The counter 割 is used for tenths, so １割 literally means 'one tenth'.