which product is not equal to -1?

Question

A. 4/5 x 85/68 = +1

B. 3/27 x -216/24= -1

C. 7/8 x -16/14 = -1

D. -1/12 x -12 = +1

are those right? And if so does that mean the answer is A and D?

Answer 1

you are correct!

Answer 2

It is not correct answer