Jewellery is an outward symbol that suggests a person's wealth. The pair that carries the same 'is a visible symbol of' relationship is spectacles and learning, since spectacles are commonly taken as a sign of a studious, learned person.
The pair that mirrors jewellery standing for wealth is spectacles standing for learning.
If the price of a commodity increases by 25%, by what percentage should the consumption be reduced to keep the expenditure the same?