Answer: -25/36
Step-by-step explanation:
Step 1 : Rewrite the equation using KCF(keep, change, flip)
-5/8 x 10/9
Step 2 : multiply 5 by 10 and 8 by 9 (or cross multiply 8 and 10)
Step 3 : determine the product's sign with the rule : same sign positive, different sign negative