-17.62% is the change from 664 to 547
Calculation steps:
[( 547 - 664 ) ÷ 664] x 100 = -17.62%
Formula
Percentage change = [(547 - 664) / 664] x 100
Subtract the new number by the original number
547 - 664 = -117
-117 ÷ 664 = -0.17620481927710843
-0.17620481927710843 x 100 = -17.62%