-77.64% is the change from 644 to 144
Calculation steps:
[( 144 - 644 ) ÷ 644] x 100 = -77.64%
Formula
Percentage change = [(144 - 644) / 644] x 100
Subtract the new number by the original number
144 - 644 = -500
-500 ÷ 644 = -0.7763975155279503
-0.7763975155279503 x 100 = -77.64%