Question:The price of cooking oil has increased by 25%. The percentage of reduction that a family should effect in the use of cooking oil so not to increase the expenditure on this account is : 

A 25% 
B 30% 
C 20% 
D 15% 

+ Answer
C 

+ Explanation
Required reduction` = [r/((100 + r))] %`

                         `= (25/125 xx 100) = 20%`

+ Report

Irin Moni

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