SOLUTION
Old Ratio (A, B and C) = 4: 3: 2
New Ratio (B and C) = 2: 1
Gaining Ratio = New Ratio − Old Ratio
B’s gain = 2/3-3/9 = 6-3/9 = 3/9
C’s gain = 1/3-2/9 = 3-2/9 = 1/9
∴Gaining Ratio = 3: 1
SOLUTION
Old Ratio (A, B and C) = 4: 3: 2
New Ratio (B and C) = 2: 1
Gaining Ratio = New Ratio − Old Ratio
B’s gain = 2/3-3/9 = 6-3/9 = 3/9
C’s gain = 1/3-2/9 = 3-2/9 = 1/9
∴Gaining Ratio = 3: 1