Answer:
103
Step-by-step explanation:
it has to add up to 180 so
180-77=103
The answer is 84 because 21 times 4 equals 84
Answer: 65%

Step-by-step explanation:
To get the percentage of the seats in the theatre were filled by the 6th graders on the trip,
it will be

1) 2.4
2) 6.4
3) 7.7
4) 9.9
5) 2.8
Hope it helps <3
Just basic simplification, make 1 of the variable alone on one side