Let the first nuumber=x
Then the second number= (6.5%)×x/8.5% =13x/17
According to question, The sum of two number is 2490.
So, x+13x/17=2490
17x+13x/17=2490
30x/17=2490
30x=2490×17
x=2490×17/30
x=83×17
x=1411
Hence first number =x=1411
and second number==13x/17=(13×1411)/17=1089