-17.92% is the change from 664 to 545
Calculation steps:
[( 545 - 664 ) ÷ 664] x 100 = -17.92%
Formula
Percentage change = [(545 - 664) / 664] x 100
Subtract the new number by the original number
545 - 664 = -119
-119 ÷ 664 = -0.17921686746987953
-0.17921686746987953 x 100 = -17.92%