Question

Brynn 的存款在七月减少了 $20\%$ ，然后在八月增加了 $50\%$ 。现在她的存款是原来的百分之多少？

Brynn's savings decreased by $20\%$ in July, then increased by $50\%$ in August. Brynn's savings are now what percent of the original amount?

$80$

$90$

$100$

$110$

$120$

答案：E

知识点：百分数

难度评级：770

视频讲解：

Click to load, then click again to play

文字解答：

若原来有 $100$ 元，减少 $20\%$ 后剩 $80$ 元。再增加 $50\%$ 得到 $80\cdot1.5=120$ 元，所以现在是原来的 $120\%$ 。

If the original amount is $100$ , then after a $20\%$ decrease Brynn has $80$ . Increasing by $50\%$ gives $80\cdot1.5=120$ , so the savings are $120\%$ of the original amount.

2026 AMC 8 第 4 题

答案：E

难度评级：770

视频讲解：

文字解答：

其他年份的第 4 题