Question

if the selling price of 10 articles is same as that of the cost price of 11 articles find the gain or loss percentage

Answer 1

SP OF 10 ARTICLES = CP OF 11 ARTICLES
NOW, LET THE COST OF 1 ARTICLE BE Rs. x
SO,
SP OF 10 ARTICLES = CP OF 11 ARTICLES
= 11x
AND, CP OF 10 ARTICLES = 10x
SO; SINCE (SP > CP)
THEREFORE, GAIN = 11x - 10x = x

NOW, GAIN % =
$\frac{gain}{cp} \times100 \\ = \frac{x}{10x} \times 100 \\ = 10\%$
THERE YOU GO!!!......