By selling 50 meters of cloth. I gain the selling price of 15 meters. Find the gain percent?

A. 35%
B. 30%
C. 40%
D. 42 6/7%

Explanation:

SP = CP + g

50 SP = 50 CP + 15 SP

35 SP = 50 CP

35 — 15 CP gain

100 — ? => 42 6/7%