-70.19% is the change from 644 to 192
Calculation steps:
[( 192 - 644 ) ÷ 644] x 100 = -70.19%
Formula
Percentage change = [(192 - 644) / 644] x 100
Subtract the new number by the original number
192 - 644 = -452
-452 ÷ 644 = -0.7018633540372671
-0.7018633540372671 x 100 = -70.19%