In an English test Alvin scored 28 out of 40 marks in mathematics he scored 36 out of 60 marks.
The difference between Alvin score for both tests was
In the English test, Alvin scored 28 out of 40 marks, so his percentage score was 28/40 x 100% = 70%.
In the mathematics test, Alvin scored 36 out of 60 marks, so his percentage score was 36/60 x 100% = 60%.
The difference in his scores between the two tests was 70% - 60% = 10%.
Therefore, the difference between Alvin's scores in the two tests was 10%.