-76.09% is the change from 644 to 154
Calculation steps:
[( 154 - 644 ) ÷ 644] x 100 = -76.09%
Formula
Percentage change = [(154 - 644) / 644] x 100
Subtract the new number by the original number
154 - 644 = -490
-490 ÷ 644 = -0.7608695652173914
-0.7608695652173914 x 100 = -76.09%