Respuesta :

Kaikerscupcake
You are trying to find how much younger Kaylee is than Lylah. 

You would subtract her age from Lylah's.

45-18= 27

Kaylee was 27 years younger than Lylah.

I hope this helps!
~kaikers
Claudiao
Kaylee would be 27 years younger than Lylah.