Question

the cp of 10 articles is equal to sp of 9 articles find the gain percent

Answer 1

let the cost of 1 article = Rs 1

cost price of 10 articles=10 × 1=Rs 10

cost price of 9 articles = 9×1= Rs 9

since, s.p of 9 articles=c.p of 10articles

then, selling price of 9 articles = Rs 10

gain = s.p - c.p = 10 - 9

gain = Rs 1

gain% = gain / cost price × 100

gain% = 1 /9 × 100

therefore, gain = 11.1 %