Given
Number of patients = 6,663
- For Sunday
Patients = 1,187
Percent is:

- For Monday
Patients = 755
Percent:

Monday is correct.
- For Tuesday
Patients = 1,085
Percent:

Tuesday is correct.
- For Wednesday
Patients = 1,031
Percent:

Wednesday is correct.
- For Thursday
Patients = 1,024
Percent:

- For Friday
Patients = 808
Percent:

Friday is correct.
- For Saturday
Patients = 773
Percent:

Saturday is correct.
Answer:
Errors
Sunday ---> 17.8%
Thursday ---> 15.4%