If 371/2% of a number is 900,then 621/2% of the number

Let 37¹/₂% of A = 900
⇒ {(75/2) x A} x 100 = 900
∴ A = (900 x 2 x 100) / 75 = 2400
So, 62¹/₂% of A = (125/2) x (1/100) x 2400 =1500