Answer:
The division was computed incorrectly.
Step-by-step explanation:
Given
Workings:
to percentage

Required
Explain his error
The question says 5/8
Instead, Alejandro's working shows 8/5.
This working is done in an incorrect order and the correct solution is:
Let

Solve the fraction

Multiply by 100%


<em>Hence, option (a) is correct.</em>
<span>potential; kinetic is the answer.</span>