# The U.S. Postal Service handles 170,000,000,000 pieces of mail each year. This is 40% of the world’s total. How many pieces of mail are sent each year?

##### 1 Answer

See a solution process below:

#### Explanation:

We can rewrite this as:

"Percent" or "%" means "out of 100" or "per 100", Therefore 40% can be written as

When dealing with percents the word "of" means "times" or "to multiply".

Finally, lets call the number of pieces of mail we are looking for "m".

Putting this altogether we can write this equation and solve for

425 billion or 425,000,000,000 pieces of mail are sent each year.