instead of multiplying a number by 9 , the number is divided by 9 . what is the percentage of error obtained ?
"let the number be x the right number is 9 x the wrong number is x / 9 error is ( 9 x - x / 9 ) = 80 x / 9 percentage of error is ( ( 80 x / 9 ) / 9 x ) * 100 = 98.765 % answer : e"
subtract(const_100, multiply(divide(divide(9, 9), multiply(9, 9)), const_100))