Enrollment in City College in 1980 was 8313 percent of enrollment in 1990. What was the percent increase in the college’s enrollment from 1980 to 1990?
10%
1623%
20%
25%
18313%
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抄写了错误的数字浪费了我很多时间,考试要注意!
(1-83⅓%)/83⅓% =1/5 注意是percent
求increase的话应该是1-1990/1980; 因为 1980=(83*1/3)/100*1990, 所以代入得出 increase了20%
抄写了错误的数字浪费了我很多时间,考试要注意!
(1-83⅓%)/83⅓% =1/5
注意是percent
求increase的话应该是1-1990/1980; 因为 1980=(83*1/3)/100*1990, 所以代入得出 increase了20%