If someone got 87.7% in the first term, how much should he get in the second term to achieve 90.5%?

To achieve an overall average of 90.5%, the person would need to get an average of 90.5% in both terms combined.

If the person got 87.7% in the first term, then the total percentage for both terms would be 87.7% + x (percentage in the second term) / 2 = 90.5%

Solving for x:

87.7% + x / 2 = 90.5%
87.7% + x = 181
x = 181 - 87.7
x = 93.3%

Therefore, the person would need to get 93.3% in the second term to achieve an overall average of 90.5%.

Let's assume that the total marks for both terms are 100.

Step 1: Find the marks obtained in the first term.

Marks in first term = 87.7% of 100 = 87.7

Step 2: Calculate the total marks required to achieve 90.5%.

Total marks required = 90.5% of 100 = 90.5

Step 3: Find the marks needed in the second term.

Marks needed in second term = Total marks required - Marks obtained in first term
= 90.5 - 87.7
= 2.8

Therefore, the person should get 2.8 marks in the second term to achieve 90.5% overall.