-39.46% is the change from 664 to 402
Calculation steps:
[( 402 - 664 ) ÷ 664] x 100 = -39.46%
Formula
Percentage change = [(402 - 664) / 664] x 100
Subtract the new number by the original number
402 - 664 = -262
-262 ÷ 664 = -0.39457831325301207
-0.39457831325301207 x 100 = -39.46%