-79.52% is the change from 669 to 137
Calculation steps:
[( 137 - 669 ) ÷ 669] x 100 = -79.52%
Formula
Percentage change = [(137 - 669) / 669] x 100
Subtract the new number by the original number
137 - 669 = -532
-532 ÷ 669 = -0.7952167414050823
-0.7952167414050823 x 100 = -79.52%