請教兩題數學題

[IRIS]

A merchant made a profit of $2.75 on the sale price of a sweater that cost the merchant $12.25
A.The profit expressed as a percent of the cost to the merchant.

B.The profit expressed as a percent of the sale price.


Ans:A

這題我覺得A B 兩項都可以解出選項的要求~
因: Sale price- Cost =profit




A decrease in the number of sales personnel in Company K to 85 percent of the original sales force resulted in a decrease of 500 in the number of monthly sales
A. The percent decrease in the number of Company K's monthly sales.

B. The percent decrease in the number of Company K's sales personnel.


Ans: 無法判斷

另外這一題 的癥結點是在monthly sales這項敘述上嗎?

以上兩題請教大大指點 感謝~~

[portia]

第一題
A cost=12.25 答案是百分之2.75/12.25
B sale price=12.25+2.75=15 答案是百分之2.75/15
所以A比較大

第二題
A 由題目中僅知道月營收減少500，並不知道本來的月營收多少，所以此選項無法判斷
B 15%