calculate the score for two test combined total 80% is A

1st test I got 10/10 and that worth 10%
second exam I got 15/20 that worth 20%

To calculate the combined score, first find out how many points you earned in total:

1st test: 10/10 = 100%
2nd test: 15/20 = 75%

Add these two together:

100% + 75% = 175%

Since the combined total is 80%, you need to convert 175% to the same scale:

175% / 2.1875 = 80%

Therefore, your combined score for the two tests is 80%.