If the cost price of 15 pens is equal to the selling price of 20 pens, find the loss per cent.
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Answer : 25% loss
CP => Cost price
SP => Selling price
N.B => Notebook
% => Percentage
x => a variable which is here equal to C.P of one N.B.
Concepts used :
1) Equation ( equating one thing to another )
2)Formula to calculate Loss
Loss = SP - CP i.e selling price - cost price
3) Formula to calculate loss%
Loss% = (Loss / C.P) × (100/1)
CP => Cost price
SP => Selling price
N.B => Notebook
% => Percentage
x => a variable which is here equal to C.P of one N.B.
Concepts used :
1) Equation ( equating one thing to another )
2)Formula to calculate Loss
Loss = SP - CP i.e selling price - cost price
3) Formula to calculate loss%
Loss% = (Loss / C.P) × (100/1)
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