⟩ If a man reduces the selling price of a fan from 400 to 380 his loss increases by 20% .What is the cost price of fan?
The question should be "the loss increases to 20%" and not "loss increases by 20%" as these two have two completely different meaning.
the former has an answer of 500
where as the latter is undeterminable as a 20 decrease to produce 20% loss, cost has to be 100.