Question

About 51.3 billion pieces of unopened junk mail ends up in a landfill each year. This is about 45% of all junk mail that is sent annually. How many pieces of junk mail are sent annually?

Answer 1

45% ------ 51,3
100% ------x
45x = 5130
x = 5130/4
x = 114 billion

Answer 2

thanks