-95.43% is the change from 657 to 30
Calculation steps:
[( 30 - 657 ) ÷ 657] x 100 = -95.43%
Formula
Percentage change = [(30 - 657) / 657] x 100
Subtract the new number by the original number
30 - 657 = -627
-627 ÷ 657 = -0.954337899543379
-0.954337899543379 x 100 = -95.43%