-61.88% is the change from 669 to 255
Calculation steps:
[( 255 - 669 ) ÷ 669] x 100 = -61.88%
Formula
Percentage change = [(255 - 669) / 669] x 100
Subtract the new number by the original number
255 - 669 = -414
-414 ÷ 669 = -0.6188340807174888
-0.6188340807174888 x 100 = -61.88%