The quotient of n and - 7 is no less than 12

Assuming you need to create an inequality, it's best to break it down bit by bit.

"the quotient" - division

"of n and - 7" - dividing n and - 7

"is no less than" - this sets a minimum, so it'll be greater than

"12" - ... twelve

so, if you put that all together

(n/-7) > 12

n divided by - 7 is greater than 12