Firstly, you do 90 - 42 to get the amount of brownies sold, which is 48. Then, you put 42 and 48 into a ratio like 42:48. After that, all you need to do is simplify to get 7:8.
All you have to do is make the fraction of it which is 4/30. Then simplify to 2/15 which is your answer.
Answer:
1) SAS
2) AA
3) SSS
Step-by-step explanation:
