-89.35% is the change from 657 to 70
Calculation steps:
[( 70 - 657 ) ÷ 657] x 100 = -89.35%
Formula
Percentage change = [(70 - 657) / 657] x 100
Subtract the new number by the original number
70 - 657 = -587
-587 ÷ 657 = -0.893455098934551
-0.893455098934551 x 100 = -89.35%