Answer:
To express these marks in the form of a proportion, we can divide each of the scores by the total score:
Bisi: 56 / (56 + 63 + 42) = 0.32
Shola: 63 / (56 + 63 + 42) = 0.36
Kehinde: 42 / (56 + 63 + 42) = 0.24
So the proportion of their scores is 0.32 : 0.36 : 0.24.
To express Shola's and Kehinde's marks each as a fraction of Bisi's marks, we can divide their scores by Bisi's score:
Shola: 63 / 56 = 1.125 (or 9/8)
Kehinde: 42 / 56 = 0.75 (or 3/4)
So Shola's marks are 9/8 of Bisi's marks, and Kehinde's marks are 3/4 of Bisi's marks.