Value in a torn bank note

I have piece of USD100 bill I was given by somebody. He said he collected it kwa mtaa. It Is a genuine one but about 10% of the note is lost.
My question is, can money value still attached to the retained piece? Do Kenyan bank accept such?

picha

Enda bank. Uwache maswali za umeffi

KCB rejected it

Go to a forex beareau hapo imax mama ngina they might accept