-91.49% is the change from 670 to 57
Calculation steps:
[( 57 - 670 ) ÷ 670] x 100 = -91.49%
Formula
Percentage change = [(57 - 670) / 670] x 100
Subtract the new number by the original number
57 - 670 = -613
-613 ÷ 670 = -0.9149253731343283
-0.9149253731343283 x 100 = -91.49%