After May gives some of her money to Sheryl, the total stays the same.

[[model:questions/solutions/q5387.png]]

• Original: May : Sheryl = \(4 : 3\)
• New ratio: May : Sheryl = \(8 : 13\)
• Total stays constant at \(8 + 13 = 21\) units (originally \(4 + 3 = 7\), scale by 3: \(12 : 9\))
• May gave \(12 - 8 = 4\) units to Sheryl
• Sheryl gained 4 units: \(9 + 4 = 13\)

Final Answer: 8 : 13