NUS GRAD: HOW MUCH ALLOWANCE SHOULD I GIVE PARENTS, IS 10% SALARY ENOUGH?

I am a graduating fourth year student and will be entering the workforce soon. Recently, my mum had a conversation about how much I should give her as monthly allowance and she said 10% of my pay. I am wondering what is the appropriate amount to give her? Is 10% the normal rate?

I am asking not because I am not willing to give but I want to know what is the amount that others will give, especially for a fresh graduate.