-27.52% is the change from 883 to 640
Calculation steps:
[( 640 - 883 ) ÷ 883] x 100 = -27.52%
Formula
Percentage change = [(640 - 883) / 883] x 100
Subtract the new number by the original number
640 - 883 = -243
-243 ÷ 883 = -0.27519818799546997
-0.27519818799546997 x 100 = -27.52%