Question

When 150 `cm^3` of water freezes, 162 `cm^3` of ice is formed. How do you calculate the percentage increase in the volume?

Answer 1

I got `8%`

Explanation:

I would use fractions for `%` and volumes in the form:

`"total amount"/"increase"`

The volume increases of `162-150=12cm^3` so with fractions:

`(100%)/(x%)=(150cm^3)/(12cm^3)`

the percentual increase will be:

`x%=100%*(12cancel(cm^3))/(150cancel(cm^3))=8%`