PLEASE HELP IM BEGGING REWARD IS 70 POINTS!!!!!

Answer:
aaaah my FIRE ALARM OFF btw i think its number3
Step-by-step explanation:
Answer:
The first one is the answer
Step-by-step explanation:
-2/5(3 - 3/4) = -9/10
All option simplify to -9/10
Except the first one.