Answer:
Elisa made the greater number of withdrawals.
Step-by-step explanation:
Given that:
Elisa withdrew $20 at a time and a total amount of $140
Number of withdrawals by Elisa = 
Number of withdrawals by Elisa = 
Francis withdrew $45 at a time and a total amount of $270
Number of withdrawals by Francis = 
Number of withdrawals by Francis = 6
On comparing;
7 > 6
Hence,
Elisa made the greater number of withdrawals.