-25.75% is the change from 664 to 493
Calculation steps:
[( 493 - 664 ) ÷ 664] x 100 = -25.75%
Formula
Percentage change = [(493 - 664) / 664] x 100
Subtract the new number by the original number
493 - 664 = -171
-171 ÷ 664 = -0.2575301204819277
-0.2575301204819277 x 100 = -25.75%