a shopkeeper forced to sell at cost price , uses a 850 grams weight for a kilogram . what is his gain percent ?
"shopkeeper sells 850 g instead of 1000 g . so , his gain = 1000 - 850 = 150 g . thus , % gain = ( 150 * 100 ) / 850 = 17.65 % . answer : option a"
multiply(divide(add(multiply(const_2, const_100), divide(const_100, const_2)), 850), const_100)