-91.01% is the change from 634 to 57
Calculation steps:
[( 57 - 634 ) ÷ 634] x 100 = -91.01%
Formula
Percentage change = [(57 - 634) / 634] x 100
Subtract the new number by the original number
57 - 634 = -577
-577 ÷ 634 = -0.9100946372239748
-0.9100946372239748 x 100 = -91.01%