Question

What is the percent for $644 is $572.67?

Answer 1

`x` = 572.67
`Δx` = `644-x` = `644-572.67=71.33`

The percent is `(Δx)/x xx100`

`71.33/572.67 xx100=12.45`

To get from 644 to 572.67, there is a 12.45% decrease needed.
That means 572.67 is 87.55% of 644.