Word Problem

Tasha and Kaitlyn love watermelon!  Their mom just brought one home from the store and cut it up for them to share. Tasha ate no pieces and Kaitlyn ate 9 pieces.

Hint:  If it helps, draw the pieces if watermelon in the space below.

Write the math equation: ______________________

How many pieces did the girls eat?  _______

Show your work!