-75.93% is the change from 644 to 155
Calculation steps:
[( 155 - 644 ) ÷ 644] x 100 = -75.93%
Formula
Percentage change = [(155 - 644) / 644] x 100
Subtract the new number by the original number
155 - 644 = -489
-489 ÷ 644 = -0.7593167701863354
-0.7593167701863354 x 100 = -75.93%