Question 1043798
weight of cellphone=x
weight of a computer =100x
weight of a TV=1000x
16.5 million computers, 6.4 million televisions, and 15 million cellphones were recycled.
This is 1.65 x 10^9  x pounds for computers (16.5 million * 100x)
6.4 x 10 ^9  x pounds of televisions
1.5 x 10^7  x mpounds of cellphones.
The total weight is 8,065,000,000  x pounds, and 15,000,000x is cellphone
That fraction is 0.00186 or 0.186% cellphone (the x cancel) by weight.