Answer: 4
Step-by-step explanation: Arrange them in number order and cross one off on the left then the right to find the middle value which should be 4
1a:
580 - (580 × .1) - 20
580 - (58) - 20
522 - 20
502
1b:
990 - (990 × .25) - 20
990 - (247.5) - 20
742.5 - 20
722.5
I'm not sure how to solve #2.
Answer:
0.12
12%
Step-by-step explanation:
SO to find the ones he did incorrectly, you would subtract 50 and 44. This is 6. He got 6 questions wrong. Now divide 6 and 50. This is 0.12.
So decimal: 0.12.
Percent 12%