Two-thirds of the planet covered in water.
Two-thirds of my household can drive,
legally or otherwise, “can” a nebulous hurdle until you leap.
A survey proved two-thirds is statistically “not bad.”
Two-thirds of people are not the first third and
two-thirds of wings are visible in the moonlight.
Two-thirds of music ends in silence.
Two-thirds of life comes down to math (i.e., luck):
the rest just floats by until we use both hands to grasp it.