Jack's average in math for the first nine weeks was an 88. his second nine weeks average decreased 12.5% what was his average for the second nine weeks? please explain how you got your answer.
Answers
Answer 1
Answer:
10% of 88 = 8.8
2.5% of 88 = 2.2
2.2 + 8.8 = 11
88 - 11 = 77
Answer 2
Answer:
Well 10% of 88= 8.8 5% then would be 4.4, so then 2.5% would be 2.2.
So it would be 10% (8.8) + 2.5% (2.2) = 10.1
So for the second nine weeks his average decreased by 12.5% (10.1) so it would be, 88-10.1= 77.9