b as a percentage of a is equal to a as a percentage of ( a + b ) . find b as a percentage of a .
explanation : according to the question : - = > b / a = a / ( a + b ) . as b is a percent of a , let us assume b = ax . then , equation ( 1 ) can be re - written as = > x = 11 + x . = > x ( 1 + x ) = 1 . = > x 2 + x + 1 = 0 . = > x = − 1 ± 5 / √ 2 thus , x = − 1 + 5 / √ 2 = > 0.62 . = > 62 % . answer : a
multiply(divide(add(negate(const_1), sqrt(add(multiply(negate(const_1), negate(const_4)), const_1))), const_2), const_100)