-19.13% is the change from 664 to 537
Calculation steps:
[( 537 - 664 ) ÷ 664] x 100 = -19.13%
Formula
Percentage change = [(537 - 664) / 664] x 100
Subtract the new number by the original number
537 - 664 = -127
-127 ÷ 664 = -0.19126506024096385
-0.19126506024096385 x 100 = -19.13%