to be reduced to four-fifths
...to decrease by one-fifth; to reduce by one-fifth; to reduce to four-fifths; to be reduced to four-fifths 下降百分之二十(或五分之一) to decrease by one quarter; to re-duce by one quarter; to reduce to three- fourths; to be reduced to three-f...
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to be reduced to four-fifths
减少到五分之四
以上为机器翻译结果，长、整句建议使用 人工翻译 。