Question

the sp of an article is 4 by 5 of its cp the loss present is

Answer 1

sp=4/5cp
loss=cp-sp
loss=cp-4/5cp
loss=5cp-4cp/5
loss=cp/5
loss% =loss/cp×100
=cp/5/cp ×100
=cp/5cp×100
=1/5×100
=20
loss%=20 is answer obtained