-98.93% is the change from 657 to 7
Calculation steps:
[( 7 - 657 ) ÷ 657] x 100 = -98.93%
Formula
Percentage change = [(7 - 657) / 657] x 100
Subtract the new number by the original number
7 - 657 = -650
-650 ÷ 657 = -0.989345509893455
-0.989345509893455 x 100 = -98.93%