-80.42% is the change from 669 to 131
Calculation steps:
[( 131 - 669 ) ÷ 669] x 100 = -80.42%
Formula
Percentage change = [(131 - 669) / 669] x 100
Subtract the new number by the original number
131 - 669 = -538
-538 ÷ 669 = -0.804185351270553
-0.804185351270553 x 100 = -80.42%