calculate the share of y , if rs . 2690 is divided among x , y and z in the ratio 5 : 7 : 9 ?
"5 + 7 + 9 = 21 2690 / 21 = 128.1 y ' s share = 7 * 128.1 = 896.7 answer : d"
multiply(divide(2690, add(add(5, 7), 9)), 5)