a shopkeeper forced to sell at cost price , uses a 900 grams weight for a kilogram . what is his gain percent ?
"shopkeeper sells 900 g instead of 1000 g . so , his gain = 1000 - 900 = 100 g . thus , % gain = ( 100 * 100 ) / 900 = 11.11 % . answer : option c"
multiply(divide(add(multiply(const_2, const_100), divide(const_100, const_2)), 900), const_100)