the present ages of reena and usha are 24 and 36 yr . respectively . what was the ratio between the ages of usha and reena respectively 8 yr ago ?
required ratio = ( 36 - 8 ) / ( 24 - 8 ) = 28 / 16 = 7 : 4 answer : a
divide(subtract(36, 8), subtract(24, 8))