Question

destiny collects 90 bottles to recycle 27 of the bottles are plastic and the rest are glass what percent of the bottles are plastic

Answer 1

30%

Explanation:

if 27 of the bottles are plastic then 63 are glass

the question becomes, "27 is what percent of 90"

let 'p' = percent that are plastic

we can use 'if/of equals percent/100'

27/90 = p/100

the above is a proportion and we can solve by

cross-multiplying to get

90p = 2700

p = 2700/90 or 270/9

which is 30%