-77.71% is the change from 646 to 144
Calculation steps:
[( 144 - 646 ) ÷ 646] x 100 = -77.71%
Formula
Percentage change = [(144 - 646) / 646] x 100
Subtract the new number by the original number
144 - 646 = -502
-502 ÷ 646 = -0.7770897832817337
-0.7770897832817337 x 100 = -77.71%