[題目] longman 4/e p.281
書名：longman 4/e
頁數：p.281
題目：188題
By how much does Alexia want to increase snack prices?
(A) 25%
(B) 30%
(C) 50%
(D) 70%
疑問：根據Alexia的信件來看他寫到by increasing it by 20% less than they recommend. 為什麼答案是B呢?
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