One in nine people on Earth do not have enough food to live a healthy and active lifestyle. If there are 7.5 billion people on Earth, approximately how many are not able to live a healthy lifestyle with the food they have?

Question

Quizplus · Accepted Answer

This is a ratio/proportion problem. 1 in 9 people don't have enough food to live a healthy lifestyle. So, how people out of 7.5 billion are not able to live a healthy lifestyle? We can write that as a proportion: 1: 9 :: x: 7,500,000,000 Step 1: Rewrite the proportion as a fraction. ¹⁄₉ = ^x⁄_{7,500,000,000} Step 2: Cross multiply. 1 * 7,500,000,000 = 9 * x Step 3: Simplify. 1 * 7,500,000,000 = 9 * x 7,500,000,000 = 9x Step 4: Simplify by dividing both sides of the equation by 9. 7,500,000,000 ÷ 9 = 9x ÷ 9 833,333,333.33 = x Step 5: Since the answer choices do not include a decimal, round to the nearest ones place. 833,333,333 = x

One in Nine People on Earth Do Not Have Enough