How to do a pie graph (to be completed)

My pie graphs explain the percentages of water in the world. In new Zealand Place:Auckland, we have a water shortage, we don´t have much water left, in the future we don´t know whats going too happen with Aucklands water. it has happened two times! this is the second time that Auckland has had a water shortage. So our teacher decided to teach us about water, the water facts, water graphs and more. We did a water poster and also did maths including water, on how to save it and also how too save Auckland with the water shortage, too save water shortages we need short showers, washing our hands but the thing is with the virus coming threw we need to learn how to wash our hands shortly but still keep clean.

My pie graphs and percentages.