Answer:
Total 32 card are left.
Explanation:
The total number of cards is 75.
It is given that Emily signed
of the total cards.
Remaining part is

It means the remaining cards are
of total card.

Remaining cards after emily sign are 45.
Josh signed 1/9 of the remaining cards. The remaining cards are
of total 45. So, the number of remaining cards after josh sign is

Remaining cards after josh sign are 40.
Tatiana singed 20% what josh had left. The remaining cards are 80% of total 40.

Therefore total remaining cards are 32.