-17.77% is the change from 664 to 546
Calculation steps:
[( 546 - 664 ) ÷ 664] x 100 = -17.77%
Formula
Percentage change = [(546 - 664) / 664] x 100
Subtract the new number by the original number
546 - 664 = -118
-118 ÷ 664 = -0.17771084337349397
-0.17771084337349397 x 100 = -17.77%