Pick the pair whose two words share the same relationship as the pair given below.
Learn : Education
In the given pair the first word is an activity and the second word is the result you gain by doing it. When you learn, you build up education, so the link is process and the outcome it produces.
So the activity to outcome relationship makes Practice : Skill the answer.
If the price of a commodity increases by 25%, by what percentage should the consumption be reduced to keep the expenditure the same?