数学
Which of the following operations carried out on both the numerator and the denominator of a fraction will always produce an equivalent fraction? Indicate all such operations?
A. Adding 2
B. Multiplying by 5
C. Dividing by 100
正确答案：B
题目解析：Quantity A长度为RT的一半，7.5，Quantity B长度为15-6=9，因此选B。
