Granny and Henry each ate 2/ 5 of a pizza. Ivan ate 8/ 9 of a pizza alone. How many pizzas did they eat altogether?
\(\dfrac 2 5+\dfrac 2 5 + \dfrac 8 9 = \\ \dfrac{18}{45}+\dfrac{18}{45}+\dfrac{40}{45} = \\ \dfrac{76}{45} = 1 \dfrac{31}{45}~pizza\)