Question

. 5/7 of 4/15 of a number is 8 more
than 2/5 of 4/9 of the same number.
What is half of that number?
​

Answer 1

Answer:

315

Step-by-step explanation:

Let the number be x.

5/7 * 4/15 * x - 2/5 * 4/9 * x = 8

=> (4/21) x - (8/45)x = 8

Take LCM of 21, 45 which is 315.

=> 60x - 56x / 315 = 8

=> 4x = 8 * 315

=> x = 630.

Thus the number is 630.

So half of the number will be 630/2 = 315.