My 2 year 3 month baby weight 8.9 birth weight 2.1 this weight is normal or abnormal please tell me. But abnormal how to improve our weight gaining.

A. at 2 years of age the baby weight should be more than 12 kgs at least it is now on lower side You just need to give your baby proper nutritious diet which includes more of green leafy vegetables sprouted grains and cereals and fruits along with proper liquid intake which will help your baby develop soon