There very much mistaked in simulator 3

when i was trying test on simulator 1 i get 550 score.
i couldnt believe if when i was doing simulator 3. i had very much mistakes. n i just got 450.
are there someone know how much mistakes in simulator 3 ?

What do you mean by ‘mistakes’?[YSaerTTEW443543]

TOEIC listening, talks: Announcing the hostile takeover of a rival company[YSaerTTEW443543]