-42.66% is the change from 640 to 367
Calculation steps:
[( 367 - 640 ) ÷ 640] x 100 = -42.66%
Formula
Percentage change = [(367 - 640) / 640] x 100
Subtract the new number by the original number
367 - 640 = -273
-273 ÷ 640 = -0.4265625
-0.4265625 x 100 = -42.66%