Anumber n is 25% of some number a and 35% of a number b. is a > b,a< , or is it impossible to determine the relationship

  "It is IMPOSSIBLE to determine the relationship."

 Because number "a" could be "30" ; and number "b" could be: "6 trillion"; for example.  Or, number "a" could be "6 trillion" and  number "b" could be "30".

OR;  "a" could equal "b" ; for example.

20%

Step-by-step explanation:

Two bags contain marbles, while Bag A contains 112 marbles, bag B contains 140 marbles.

Number of marbles in bag A = 112

Number of marbles in bag B = 140

Differences in the marbles

= 140-112= 28

Percent fewer marbles in Bag A than Bag B will be:

Difference in marbles in the bags divided by the marbles in bag B multiplied by 100.

= 28/140 × 100

= 1/5 × 100

= 20%