Choose the word which is congruous to the word given in capitals.
IMPUTE
To "impute" something means to assign or ascribe it to a person or cause, often blame or responsibility. The word that carries this exact sense of ascribing is "attribute".
Hence "attribute" is the correct synonym of IMPUTE.
If the price of a commodity increases by 25%, by what percentage should the consumption be reduced to keep the expenditure the same?