Interesting figures are expressed in percentages almost 99% of times. Some examples are 94% of life on Earth is aquatic, 70% of the planet is ocean, 50% of the United States lies below the ocean, humans have only explored less than 5% of the Earth’s oceans and the earth’s longest mountain range, called the Mid-Oceanic Range covers almost 23% of the earth’s surface! It’s therefore a great idea to understand and apply the popular math symbol – that of the percentage – and put your skills to good use! Download this free 7th grade math PDF for more practice at home or school.