Question

If the selling price of an article is 4/5 of its cost price, find the loss per cent.
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Answer 1

let, the s.p of an article=100/-

4/5th of s.p = 4/5*100 = 80/-

% loss= cp-sp/cp * 100

100–28= x-80/x *100

by solving you will get x= 8000/27 which can be further simplified as 1000/9

i.e cp= x = 1000/9

now, sp = 6/5 * 100 = 120/-

%p= sp-cp/cp * 100

%p= 120 - 8000/27 / 8000/27 * 100

solving above equation

%p = 8%

MARK BRAINLIEST ヾ(＾-＾)ノ

Answer 2

Answer:

loss=4/5-1=4-5/5=-1/5

so loss%={1/5}/4/5×100=(1/5×5/4)×100=25%