what is the value of ( p + q ) / ( p - q ) if p / q is 8 ?
"( p + q ) / ( p - q ) = [ ( p / q ) + 1 ] / [ ( p / q ) - 1 ] = ( 8 + 1 ) / ( 8 - 1 ) = 9 / 7 answer : e"
divide(multiply(add(add(const_100, const_60), const_1), 8), const_100)