Question

if rekha sells 16 article for the same money as she pays for 20, her gain in percentage is​

Answer 1

let the 16 article cost be 100

1 article =100/16

20 article sp=100

1 article=100/20

p=100/16 -100/20

=500-400/80

=100/80

p%=p/cp×100

=1000/8000×100

=12.5%