A pie diagram is a diagram shaped like a pie, or a circle, each item listed would take up a part of the pie. The pie should total 100.
Imagine if you split a circle into 5 slices but each slice would be different sizes.
Food would make up 30% of the pie, making it the biggest slice.
Other would be the next biggest slice making up 25% of it.
Then Cloth with 17%.
Then Rent with 15%.
Then education with 13%.