a watch was sold at a loss of 10 % . if it was sold for rs . 140 more , there would have been a gain of 3 % . what is the cost price ?
"90 % 103 % - - - - - - - - 13 % - - - - 140 100 % - - - - ? = > rs . 1077 answer : c"
divide(multiply(140, const_100), subtract(add(const_100, 3), subtract(const_100, 10)))