-19.43% is the change from 664 to 535
Calculation steps:
[( 535 - 664 ) ÷ 664] x 100 = -19.43%
Formula
Percentage change = [(535 - 664) / 664] x 100
Subtract the new number by the original number
535 - 664 = -129
-129 ÷ 664 = -0.19427710843373494
-0.19427710843373494 x 100 = -19.43%