Question

if 150 empty water bottles weigh 4.5 pounds what do you expect 90 water empty bottles to weigh?

Answer 1

it's 2.7 pounds because I set up a proportion of 150 over 90 = 4.5 over X and multiplied 90 * 4.5 divided by 150

Answer 2

2.7 pounds. I did 150x=4.5, and found that x=.03. Then, you just multiply it by 90 to find the weight.