Let M represent the difference in the gravitational fields produced by the Moon at the points on the Earths surface nearest to and farthest from

Let ΔM represent the difference in the gravitational fields produced by the Moon at the points on the Earth’s surface nearest to and farthest from the Moon. Find the fraction ΔM/g, where g is the Earth’s gravitational field. (This difference is responsible for the occurrence of the lunar tides on the Earth.)