Question

if a person sells an article for 400 gaining one fourth of its CP find the gain percentage​

Answer 1

CP of an object = (100) / (100+g) x SP = 100 / (100+25) x 400 = (100 / 125) x 400 = Rs 320SP of the article for a gain of 20%  = [(100 + g) / 100] x CP

= [(100 + 20) / 100] x 320 = [120 / 100] x 320 = Rs 384