Question

90% of A is equal to 30% of B. what is the relation between A & B?

Answer 1

90percent of A =90/100*A =9/10A
30percent of B = 30/100*B = 3/10*B
therefore, 9/10*A=3/10*B
               9/10*10/3*A=B
               3A=B

Answer 2

90% of A = 30% of B
90/100*A=30/100*B
9*A=3*B
3A=B