Answer:
-1/2
Step-by-step explanation:
The first thing you do is cross cancel because when you cross cancel 4 and 16 it would be -1/5 * 10/4 then you cross cancel 5 and 10 and then you faction would look like -1/1 * 2/4 then you multiply those fractions together and get -2/4 but simplified would be -1/2.
