The lcm of 165xy and 77x 3 y is 1,155x 3y 11xy 12,705x 4y 2 105x 3y

The least common multiple (LCM) can be determined by factoring out the terms first,
                             165xy = (3)(11)(5)(x)(y)
                              77x³y = (7)(11)(x)(x)(x)(y)
Copy the factors writing off the repeated factors only once,
                        LCM = (3)(11)(5)(x)(y)(7)(x)(x)= 1155x³y
The answer is 1155x³y (first choice) 

1935/10,000= 387/2000the answer to the question is c