1.

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

Answer»

Let the number be x. then 4/15 of 5/7 of x-4/9 of 2/5 of x=8

4/21x-8/45x=8 

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

(60-56)/315x=8

4/315x=8 

x=(8*315)/4=630

1/2x=315 

Hence required number = 315. 



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