AMC8 2003

AMC8 2003 · Q3

AMC8 2003 · Q3. It mainly tests Fractions, Percent.

A burger at Ricky C’s weighs 120 grams, of which 30 grams are filler. What percent of the burger is not filler?

Ricky C’s的一份汉堡重120克，其中30克是填充物。汉堡中非填充物的百分比是多少？

(A) 60% 60%

(B) 65% 65%

(D) 75% 75%

(E) 90% 90%

Answer

Correct choice: (D)

正确答案：（D）

Solution

Since 30 of the 120 grams are filler, $\frac{30}{120} = 25\%$ of the burger is filler. So $100\% - 25\% = 75\%$ of the burger is not filler. OR There are $120 - 30 = 90$ grams that are not filler. So $\frac{90}{120} = 75\%$ is not filler.

因为120克中有30克是填充物，\frac{30}{120} = 25\% 是填充物。所以100\% - 25\% = 75\% 是非填充物。或者非填充物有120 - 30 = 90克。所以$\frac{90}{120} = 75\%$是非填充物。

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