-92.1% is the change from 671 to 53
Calculation steps:
[( 53 - 671 ) ÷ 671] x 100 = -92.1%
Formula
Percentage change = [(53 - 671) / 671] x 100
Subtract the new number by the original number
53 - 671 = -618
-618 ÷ 671 = -0.9210134128166915
-0.9210134128166915 x 100 = -92.1%