-43.59% is the change from 640 to 361
Calculation steps:
[( 361 - 640 ) ÷ 640] x 100 = -43.59%
Formula
Percentage change = [(361 - 640) / 640] x 100
Subtract the new number by the original number
361 - 640 = -279
-279 ÷ 640 = -0.4359375
-0.4359375 x 100 = -43.59%